Preface - XENTRY Portal · Preface . R-M Automotive ... 3.2 MB 1: Surface refinishing . 3.3 MB 2: ... Alubeam Silver Met. MB-0047 . 4.2. Tri-coat paint systems (example: hyacinth

Technical information

Preface

R-M Automotive Refinish Paints, Z.I.du Merret F-60676 Clermont de l'Oise Cedex, Tel. (+33) (0) 3 44 77 77 77

Page 1 of 61 Perfection made simple

Dear readers,

“Mercedes-Benz-specific information”, which is of importance for high-quality refinishing, is addressed below. The purpose of this new form of Technical Information is to provide the relevant bodyshop employee with the necessary specialist information to enable a refinishing job to be carried out reliably and successfully in accordance with the Mercedes-Benz specifications.

Further specific paint manufacturer information, e.g. technical data sheets for products, refinishing methods, safety data sheets, mixing formulas and a great deal more besides, can be viewed directly on our website or downloaded from there. To do so, please click on the link below:

www.rmpaint.com

Remarks: The data contained in this publication are based on our current knowledge and experience. In view of the many factors that may affect processing and application of our products, these statements do not relieve processors from carrying out their own investigations and tests; neither do these data imply any guarantee of certain properties, nor the suitability of the products for a specific purpose. Any descriptions, drawings, photographs, data, proportions, weights etc. given herein are for general information purpose only; they may change without prior information and do not constitute the agreed contractual quality of the products (product specification). The latest version supersedes all previous versions. You can obtain the latest version from our website at www.glasurit.com or directly from your sales partner. It is the responsibility of the recipient of our products to ensure that any proprietary rights and existing laws and legislation are observed.

http://www.rmpaint.com/

Technical Information

CONTENTS


1. Quality refinishing

1.1 Preparation of refinishing process 1.2 Sanding process 1.3 Primer fillers for warranty repairs

2. Warranty refinishing processes

2.1 Metal 2.1.1 Refinishing with Epoxy Primer Filler EUROXY CP 2.1.2 Refinishing with PU Primer Filler DIRECTFILLER GREY

2.2 Plastics 2.2.1 Refinishing with PU Primer Filler PERFECTFILLER GREY

3. Economic repair

3.1 Decision diagram 3.2 MB 1: Surface refinishing 3.3 MB 2: Repair of scratches/stone chip damage 3.4 MB 3: Repairs including body filling work (<1dm²) 3.5 MB 4: Refinishing of new parts 3.6 MB 5: Refinishing of repaired or welded body parts

4. Mercedes-Benz-specific refinishing processes

4.1. Alubeam Silver Met. MB-0047 4.2. Tri-coat paint systems (example: hyacinth red met. MB-3996) 4.3. Matt refinishing process / Matt Shade Concept 4.4. Carbon fiber reinforced plastics (CRP)

4.4.1 Topcoated carbon fibre 4.4.2 Visible carbon fibre 4.4.3 Carbon premium finish

5. Color matching

5.1. Color code on rating plate 5.2 Search and selection of the correct mixing formula

6. Information regarding the paint manufacturer

You can find the following information on our homepage: www.rmpaint.com Technical Information Material safety data sheets Mixing formulas



Quality refinishing 1.1 Preparation of refinishing process


General The term “quality refinishing” is used in general to refer to a perfectly executed repair of damage which may have been caused in an accident. The aim of this is to ensure that as far as possible the client (e.g. the vehicle owner) detects no visual differences from the OEM coating or the area surrounding the refinished vehicle panels (colour match, gloss, appearance etc.).

1.1 Preparation for spraying Carrying out a quality refinishing job as described above is dependent not just on the spray painter’s expert skills, but also on the observance of the prerequisites set out below:

Scrupulous cleanliness (all around the bodywork to be sprayed) Selection of suitable tools and equipment (sanding media, sanding equipment, masking materials

and tapes, cleaning cloths etc.) Selection and use of the necessary degreasing and cleansing agents Selection of the appropriate refinish materials for the respective purpose and their expert application

in accordance with the paint manufacturer’s Technical Information and recommended processingmethod

Selection and expert use of the relevant polishing media and equipment, polishing cloths etc. forfinishing the repair areas and neighbouring car body surfaces.

In addition, of course, modern workshop equipment, a well organised workflow and workplace and, naturally, also the spray painter being trained in the latest techniques play a significant role in achieving a quality refinish result (“first run OK”).

Remarks: All work must, of course, be carried out in compliance with the applicable health and safety

provisions, e.g. gloves, respiratory protective equipment. protective glasses etc. (personalprotective equipment) must be worn.

It is also mandatory for the relevant environmental provisions to be met. The “mixed use” of paint from different paint manufacturers is not permitted, for both quality and

warranty-related reasons!


Quality refinishing 1.2 Sanding process



1.2 Sanding process The sanding media industry now offers outstanding, highly efficient sanding media tailored specifically to every sanding process and every refinishing technology. Today’s modern refinish products are now all (from the undercoat material to the topcoat) designed for dry sanding. Accordingly, the sanding process which may be necessary is substantially more efficient than wet sanding, while retaining an optimum sanding result.

As already described in 1.1, the selection of the most suitable sanding media and equipment (e.g. grit, random orbital sander) is especially important both for the refinishing process and for the respective refinish paint. It is essential to follow the specifications and recommendations of the refinish paint manufacturer in order to achieve the desired high-quality coating result with the greatest possible quality and efficiency. Please refer to the relevant technical information for the correspondingly detailed information and recommendations.

In addition, the respective recommendation of the sanding media manufacturer (grit, waiting time, equipment, orbit diameter etc.) is also very helpful in achieving an efficient operation.

Remarks: The sanding equipment to be used must always be appropriately connected to a dust extraction

system. Regular maintenance and cleaning are absolutely essential to ensure the maximum suctionperformance of the dust extraction system.

A very wide range of materials (aluminium, magnesium, plastics, carbon fibre etc.) is usednowadays in the modern automotive industry, including for the outer skin to be sprayed, in order tosave weight, among other reasons. Particular attention must be paid to this development becauseserious problems in terms of quality and personal protection can occur during any sandingoperations which may be necessary (see below).


Quality refinishing 1.2 Sanding process

Page 5 of 61Perfection made simple

Aluminium: Risk of galvanic corrosion as a result of the simultaneous use of a sanding medium for aluminium

and sheet steel/galvanised sheet steel Risk of a dust explosion in the event of an inadequate dust extraction system or the complete

absence of such a system

Recommended measures A separate workplace must be created for working on aluminium surfaces, and this must be used

exclusively for working on aluminium substrates. All products and equipment (e.g. sanding media and machines) must be used exclusively in this

area (aluminium workplace). An effective dust extraction system for the aluminium sanding fines is absolutely essential. Here,

too, regular maintenance and cleaning of the dust extraction system are absolutely vital.

Carbon fibre reinforced plastics (CRP) A dust explosion can occur when sanding carbon fibre surfaces in the event of an inadequate dust

extraction system or the complete absence of such a system (see also Aluminium). When working on visible carbon fibre surfaces (as in the AMG GT, for example) the paint

manufacturer’s technical data sheets must be followed.

Recommended measures A separate workplace must also be created for working on carbon fibre surfaces, and this must be

used exclusively for working on carbon fibre surfaces. All products and equipment (e.g. sanding media and machines) must only be used in this area

(carbon fibre workplace). An effective dust extraction system for the carbon fibre sanding fines is absolutely essential.


Quality refinishing 1.3 Primer fillers for warranty repairs



1.3 Primer fillers for warranty repairs If a warranty repair has to be carried out, this is usually a repair in which, for example, undercoats with the maximum possible corrosion resistance are used. The aim of this is to achieve a level of corrosion protection which is largely comparable to that of the OEM coating.

Two different technologies can be used for this very demanding quality requirement which differ primarily in terms of the binder chemistry used:

a. EUROXY CP Traditionally widely used product with varied usage options Good corrosion protection Can be used on steel, galvanised steel and aluminium

b. DIRECTFILLER GREY Latest undercoat technology Very good corrosion protection Varied options for use (e.g. adhesion promoter, corrosion protection, wet-on-wet processing,

greyshade concept, etc.) Can be used on steel, galvanised steel and aluminium

Please refer to the following pages for detailed information relating to use and the refinish system.


Warranty refinishing processes 2.1 Metal 2.1.1 Refinishing with Epoxy Primer Filler EUROXY CP


General This refinishing process should be used especially in repair jobs relating to guaranty or warranty obligations (e.g. repair of construction-related damage). It includes all working steps usually required within a repair job, from pre-treatment to finishing.

Substrates/pre-treatment/paint system

Clean with PK 700 or PK 900.

Sand (steel with P80, aluminium with P150-P180, galvanised steel with P240).

Clean the surface with PK 1000.

Do not use STOP MULTI on phosphating primers or thermoplastic substrates.

Putty

< 12°C 12 – 25°C > 25°C

STOP MULTI 100 g 100 g 100 g

Hardener 3 g 2.5 g 1.5 g

Potlife: 5 minutes at 20°C

Spraycoats: 2 - 3

Drying at 20°C 20 min Drying at 60°C 10 min Drying will take longer when product is applied to a cold substrate.

or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 4 min at 50% (medium wave) 6 min

Dry with P80, P150, P240.






Primer filler

EUROXY CP 100 (vol.) 100 g EUROXY CP Reactive 25 (vol.) 16 g FR 500 25 (vol.) 15 g

Viscosity at 20°C ISO 4 cup 40 to 50 seconds DIN 4 cup 18 to 20 seconds

Potlife: 8 hours at 20°C in a sealed container

HVLP gravity-feed spraygun 1.7 – 1.9 mm 0.7 bar at the nozzle Compliant gravity-feed spraygun 1.6 – 1.8 mm 2.0 bar

Sand primer filler Spraycoats: 2 Film thickness: 40 – 50 µm

Drying at 20°C 8 hours Drying at 60°C 30 min

or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 11 min (medium wave) 10 – 15 min

Further treatment

Dry sand with P400.





Basecoat mixing system

ONYX HD basecoat 100 (vol.) depending on colour HYDROMIX 60 (vol.) 60 g

Viscosity at 20°C ISO 4 cup: 42 to 68 seconds DIN 4 cup: 18 to 25 seconds

Potlife: ONYX HD colours mixed to formula: 6 months in a sealed plastic vessel. ONYX HD ready for use: 1 week in a sealed plastic vessel.

HVLP gravity-feed spraygun 1.4 – 1.5 mm 0.7 bar at the nozzle

Solid colours Metallic or pearl-effect colours Spraycoats: 2 - 3 1 or 2 + 1 coat to match the effect Film thickness: 20 – 25 µm 12 – 15 µm Flash off until mat after each spraycoat.

Drying at 20°C approx. 10 min The drying process can be accelerated by additional blow drying.

Drying at 60°C approx. 10 min + cooling

or ----------------------------------------------------------------------------------------------------------------------------

Infrared drying 1st spraycoat Flash off at room temperature until matt 2nd spraycoat at 40-50°C (max. 60°C) surface temperature to matt surface + cooling Harmonising coat Flash off at room temperature until matt

Further treatment Apply one of the recommended R-M clears. ONYX HD basecoats may be overcoated with the same product after the indicated drying times.




Clear

SUPREMELUX CP 300 (vol.) 100 g H 420 100 (vol.) 37 g SC 820 25 (vol.) 29 g


Potlife: 2 hours at 20°C

HVLP gravity-feed spraygun 1.3 – 1.5 mm 0.7 bar at the nozzle Compliant gravity-feed spraygun 1.3 – 1.4 2.0 – 2.5 bar

Spraycoats: 2 Film thickness: 40 – 60 µm 3 min between spraycoats On vertical surfaces, apply one thin and one full spraycoat without intermediate flash-off (film thickness of approx. 50 µm).

Drying at 60°C 30 min

or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min

Further treatment Finishing operations after specified drying times and cooling.


Warranty refinishing processes 2.1 Metal 2.1.2 Refinishing with PU Primer Filler DIRECTFILLER GREY


General This refinishing process should be used especially in repair jobs relating to guaranty or warranty obligations (e.g. repair of construction-related damage). It includes all working steps usually required within a repair job, from pre-treatment to finishing.





Do not use STOP MULTI on phosphating primers or thermoplastic substrates.

Putty

< 12°C 12 – 25°C > 25°C




Spraycoats: 2 - 3


or ----------------------------------------------------------------------------------------------------------------------------


Dry sand with P80, P150, P240.






Primer filler

DIRECTFILLER GREY 100 (vol.) 100 g D 701 20 (vol.) 13 g FR 500 20 (vol.) 11 g


Potlife: 90 min at 20°C

HVLP gravity-feed spraygun 1.7 – 1.9 mm 0.7 bar at the nozzle Compliant gravity-feed spraygun 1.6 – 1.8 mm 2.0 – 2.5 bar

Spraycoats: ½ + 1 ½ + 2 Film thickness: 50 – 70 µm 80 – 120 µm

Drying at 20°C 12 h 12 h Drying at 60°C 35 min 45 min

or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 10 min 15 min

Further treatment

Dry sand with P400 – P500.










Solid colours Metallic or pearl-effect colours Spraycoats: 2 - 3 1 or 2 + 1 coat to match the effect Film thickness: 20 – 25 µm 12 – 15 µm Flash off until matt after each spraycoat.



or ----------------------------------------------------------------------------------------------------------------------------

Infrared drying 1st spraycoat Flash off at room temperature until matt 2nd spraycoat at 40-50°C (max 60°C) surface temperature to matt surface + cooling. Harmonising coat Flash off at room temperature until matt





Clear







or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min



Warranty refinishing processes 2.2 Plastics 2.2.1 Refinishing with PU Primer Filler PERFECTFILLER GREY




Sand with P80 or P150.

Clean with PK 1000.

STOP FLEX can be applied to all paintable plastic substrates normally used by the automotive industry. The product is not suitable for use on unpaintable pure polypropylene (PP) and polyethylene (PE).

Putty

STOP FLEX 100 g Hardener 3 g Unsuitable for highly flexible plastic substrates

Spraycoats: 1 - 2

20°C 25 – 35 min 60°C 15 min

or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min (medium wave) 10 min

Dry-sand with P80, P150, P240, P320.






Primer

AM 870 SEALERPLAST 90 Shake vigorously for 2 min before use.

Spraycoats: 1 - 2 Film thickness: 5 µm

Flash off at 20°C 15 min

Primer filler

PERFECTFILLER GREY 400 (vol.) 100 g FLEX 100 (vol.) 16 g D 70 / D 80 150 (vol.) 23 g FR 500 100 (vol.) 14 g Alternatively, use filler mixes or mixes for highly flexible plastic parts as shown in Appendix A 1.6.1, “Undercoat mixing ratios”.

Spraycoats: 2 Film thickness: 50 – 70 µm

20°C 3 hours 60°C 20 min

or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 9 min

Dry-sand with P400.










Solid colours Metallic or pearl-effect colours Spraycoats: 2 - 3 1 or 2 + 1 coat to match the effect Film thickness: 20 – 25 µm 12 – 15 µm Flash off until mat after each spraycoat.



or ----------------------------------------------------------------------------------------------------------------------------






Clear





Spraycoats: 2 Film thickness: 40 – 60 µm 3 min. between spraycoats On vertical surfaces, apply one thin and one full spraycoat without intermediate flash-off (film thickness of approx. 50 µm).


or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min



Economic Repair 3.1 Decision diagram


MB 1 Surface refinishing

MB 2 Repair of scratches/

stone chipping

MB 3 Repairs including body filling work

(<1dm²)

MB 4 Refinishing of new

parts

MB 5 Refinishing of

repaired or welded body parts

Cleaning PK 700 / 900 / 1000

■ ■ ■ ■ ■

Putty(coarse &fine)

STOP MULTI

■ □ ■

Cleaning PK 1000

■ □ ■

Primer

EUROFILL □ ■ ■ □

Filler

EXTRASEALER WHITE / BLACK

□ ■ ■ ■

Filler

PROFILLER GREY / WHITE / BLACK

◊ ◊ ◊ ◊

Primer filler

DIRECTFILLER GREY

■

Basecoat

ONYX HD ■ ■ ■ ■ ■

Clearcoat

SUPREMELUX CP ■ ■ ■ ■ ■

■ = necessary □ = if required ◊ = optional


Economic Repair 3.2 Surface refinishing MB 1




Sand (steel with P80, aluminium with P150-P180, galvanised steel and solvent-resistant old paintwork with P320). New e-coated parts do not have to be scuff-sanded.


Prime rather large bare metal areas with EUROFILL before application of 2K filler EXTRASEALER WHITE / BLACK.

Primer (if required)

EUROFILL 100 (vol.) 100 g EUROFILL CATALYST 100 (vol.) 74 g


Flash off at 20°C 10 to 15 minutes

Further treatment After the flash-off, apply R-M 2K PU Filler wet on wet. When the flash-off time exceeds 2 hours at 20°C, de-nib the surface to which PU filler will be applied.




Filler (if required)

EXTRASEALER WHITE / BLACK 300 (vol.) 100 g D 70 / D 80 100 (vol.) 23 g FR 500 100 (vol.) 21 g


Flash-off at 20°C 15 min

Further treatment Apply R-M topcoat wet on wet. Parts coated with EXTRASEALER WHITE / BLACK can be overcoated without intermediate sanding.






or ----------------------------------------------------------------------------------------------------------------------------


Further treatment ONYX HD basecoats may be overcoated with the same product after the indicated drying times.




Clearcoat


Spraycoats: 2 Film thickness: 40 – 60 µm 3 min. between spraycoats On vertical surfaces, apply one thin and one full spraycoat without intermediate flash-off (film thickness of approx. 50 µm).


or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min



Economic Repair 3.3 Repair of scratches/ stone chipping MB 2






Primer





Filler













or ----------------------------------------------------------------------------------------------------------------------------






Clear




or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min



Economic Repair 3.4 Repairs including body filling work (<1dm²) MB 3


Substrates/pre-treatment/cleaning




Do not use STOP FIN on phosphating primers or thermoplastic substrates.

Putty

< 12°C 12 – 25°C > 25°C



Spraycoats: 2 - 3


or ----------------------------------------------------------------------------------------------------------------------------








Primer





Filler













or ----------------------------------------------------------------------------------------------------------------------------






Clearcoat




or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min



Economic Repair 3.5 Refinishing of new parts MB 4







Putty (if required)

< 12°C 12 – 25°C > 25°C



Spraycoats: 2 - 3


or ----------------------------------------------------------------------------------------------------------------------------






Substrates/pre-treatment/cleaning (if required)


Primer (if required)





Filler













or ----------------------------------------------------------------------------------------------------------------------------






Clearcoat




or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min



Economic Repair 3.6 Refinishing of repaired or welded body parts MB 5







Putty

< 12°C 12 – 25°C > 25°C



Spraycoats: 2 - 3


or ----------------------------------------------------------------------------------------------------------------------------








Primer filler




or ----------------------------------------------------------------------------------------------------------------------------


Further treatment











or ----------------------------------------------------------------------------------------------------------------------------






Clearcoat




or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min



Mercedes-Benz-specific refinishing processes 4.1 Alubeam Silver met. MB-0047







Putty

< 12°C 12 – 25°C > 25°C




Spraycoats: 2 - 3


or ----------------------------------------------------------------------------------------------------------------------------








Primer filler



Potlife: 90 min at 20°C




or ----------------------------------------------------------------------------------------------------------------------------


Further treatment






Transparent precoat

ONYX BLENDER PRO 100 (vol.)

HYDROMIX 60 (vol.)


Potlife: 8 h (one working day)

HVLP gravity-feed spraygun 1.4 – 1.5 mm Information regarding the spraying pressure: See process described in BLEND'ART ONYX HD on the R-M website www.rmpaint.com

See process described in BLEND'ART ONYX HD on the R-M website www.rmpaint.com

See process described in BLEND'ART ONYX HD on the R-M website www.rmpaint.com




Basecoat mixing system (ONYX HD “MB-0047”)

ONYX HD basecoat MB-0047 100 (vol.) HYDROMIX 60 (vol.)




Spraycoats: 1 or 2 + 1 coat to match the effect Film thickness: 12 – 15 µm Flash off until matt after each spraycoat.



or ----------------------------------------------------------------------------------------------------------------------------






Clearcoat







or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min



Mercedes-Benz-specific refinishing processes 4.2 Tri-coat paint systems (example: hyacinth red met. MB 3996)


General In principle, panel repairs with translucent three-layer systems with ONYX HD are possible, and therefore, generally, it is not necessary to respray adjacent body parts. If colour deviations which exceed tolerances are to be expected, however, it can be more expedient to balance these out by blending them to fade. The spray painter has the choice here, depending on the actual damage, of spraying only within the panel or fading into the adjacent panel. This method can be substantially more efficient and cost-effective than time-intensive retinting.

1. Pre-treatment

Clean with PK 1000.

Dry-sand filler patch with P400.

Sand the adjacent panel with P1000 – P2000.

Clean with PK 2000.

2) Refinishing of the panel to be repaired / the new panel, step 1

Masking: Cover the adjacent panel with masking film. Mixing ratio:

ONYX HD MB-3996 Step1 100 (vol.)HYDROMIX 60 (vol.)

Spraygun: 1.4 – 1.5 mm HVLP Pressure: 2.0 bar Spraycoats: 1 or 2 + 1 coat to match the effect on the panel to be

repaired Please note: Do not insert a screen in the spraygun when applying

a metallic or pearl-effect basecoat. When using HB004 Mixing Clear slow in the mixing

formula, HYDROMIX slow must also be used.




3) ONYX BLENDER PRO

Masking: Remove the masking film from the adjacent panel. Mixing ratio:

ONYX BLENDER PRO 100 (vol.) HYDROMIX / HYDROMIX SLOW 60 (vol.)

Potlife: 8 hours Spraygun: 1.4 – 1.5 mm HVLP Pressure: 2.0 bar Spraycoats: 1 full spraycoat to the panel to be repaired, fading into

the adjacent panel Flash-off: No flash off!

Must be wet during the complete paint process. At higher temperatures, ONYX BLENDER PRO can also be applied after the first ONYX HD spraycoat.

4) Painting of transition into the neighbouring panel, step 1

Mixing ratio: ONYX HD MB-3996 step1 100 (vol.)HYDROMIX 60 (vol.)

Spraygun: 1.5 mm HVLP Pressure: 1.0 bar Spraycoats: Blend in the transition between the panel being repaired

and the adjacent panel with 1-2 spraycoats. Flash-off: Flash off the coated area with the venturi system until matt.




5) Painting of transition into the neighbouring panel with mixture of paint material of step 1 andstep 2

Mixing ratio: ONYX HD MB-3996 step1 100 (vol.) ONYX HD MB-3996 step1 200 (vol.)

Mix ONYX HD 3996 step 1 + 2 100 (vol.) HYDROMIX 60 (vol.)

Spraygun: 1.5 mm HVLP Pressure: 1.0 bar Spraycoats: 1-3 spraycoats, fading out on both panels Flash-off: Use venturi system to flash off until matt

6) Painting of the panel to be repaired / the new panel and the neighbouring panel, step 2

Mixing ratio: ONYX HD MB-3996 step 2 100 (vol.) HYDROMIX 60 (vol.)

Spraygun: 1.5 mm HVLP Pressure: 2.0 bar Spraycoats: Apply the first spraycoat, overlapping onto the adjacent

panel. Flash-off: Use venturi system to flash off until matt

7) Painting of the panel to be repaired / the new panel and the neighbouring panel, step 2

Mixing ratio: ONYX HD MB-3996 step 2 100 (vol.) HYDROMIX 60 (vol.)

Spraygun: 1.5 mm HVLP Pressure: 2.0 bar Spraycoats: Apply the first spraycoat, overlapping onto the adjacent

panel. Flash-off: Use venturi system to flash off until matt




8) CHRONOLUX CP, step 3

Mixing ratio: CHRONOLUX CP 300 (vol.) H 420 100 (vol.) SC 820 / SPEEDFLASH 100 (vol.)

Spraygun: 1.3 mm HVLP Spraycoats: 1 thin and 1 full spraycoat, overlapping. Flash-off: not necessary Drying: 15 min at 60°C with SC 820

15 min at 60°C with SPEEDFLASHor short-wave infrared, 8 min at 100%


Mercedes-Benz-specific refinishing processes 4.3 Matt refinishing process / Matt Shade Concept


General R-M Matt Shade Concept was designed to repair matt surfaces on ONYX HD basecoat with the clears SILICATOP and SATINTOP. By mixing both matt clears, gloss levels of 12 up to 65 units at an angle of 60 can be achieved.

The gloss level may be higher for light and pure silver colours. Additionally, car bodies may show gloss level differences between vertically and horizontally coated panels. Therefore, we recommend to produce a spray-out sample before each refinishing job and to compare it with the area to be repaired.

Measures against gloss level deviations: In order to avoid gloss level deviations, R-M recommends to use the R-M Matt Shade Concept swatch to determine the gloss level of the vehicle to be repaired, to stir up the clears well before use, to adhere to the recommended basecoat and clearcoat film thicknesses to allow the clear to flash off until completely matt after each spraycoat. (Generally, after the first

spraycoat allow to flash off about 15 min and after the second spraycoat for about 20 min) to paint plastic parts with SILICATOP and SATINTOP without adding FLEX additive.

Important information for matt surfaces: Matt surfaces cannot be polished to remove dust inclusions. Matt surfaces cannot be faded out. Therefore, always apply the clear to the whole panel!

For further information regarding the Matt Shade Concept please refer to the technical data sheets for the Special Process B6 on the R-M website www.rmpaint.com.





Clean with PK 2000.


Stir well before use. ONYX HD basecoat 100 (vol.) depending on colour HYDROMIX 60 (vol.) 60 g Mix intensively immediately after weighing. Strain before application. Please note: Do not insert a screen in the spraygun when applying a metallic or pearl-effect basecoat. When using HB004 Mixing Clear slow in the mixing formula, HYDROMIX slow must also be used.

42 to 68 seconds ISO 4 cup at 20°C









Clear (1/2)

Mixing ratio of R-M clears to achieve a gloss level of 12-65 units

when using hardener H 9000:

Mixing ratio (% by weight):

Gloss level +/- 2 at an angle of 60°

20 25 30 40 53 65

SILICATOP 100 80 60 30 / /

SATINTOP / 20 40 70 100 75

STARTOP HS / / / / / 25

Stir well before use.

Clearcoat mixture 100 (vol.) 100 g H 9000 25 (vol.) 27 g SC 850 25 (vol.) 22 g

when using hardener H 420:

Mixing ratio (% by weight):

Gloss level +/- 2 at an angle of 60°

12 20 25 30 40 53 65

SILICATOP 100 60 40 20 / / /

SATINTOP / 40 60 80 100 90 80

CRYSTALCLEAR CP / / / / / 10 20

Stir well before use.

Clearcoat mixture 100 g H 420 23 g SC 850 36 g




Clear (2/2)


Spraycoats: 2 Film thickness: 40 – 50 µm Flash off until matt between spraycoats and before stoving. After the first spraycoat, allow to flash off for 10 - 15 min, after the second spraycoat for 15 - 20 min. Do not flash off for more than 25 minutes.



Mercedes-Benz-specific refinishing processes4.4 Carbon fibre reinforced plastic (CRP)


General Carbon fibre reinforced plastics consist of carbon fibre filaments embedded in epoxy resin. A characteristic feature of these materials is their very high stability at a low density. If these carbon fibre filaments are used for producing vehicle bodies or bodywork components, they are embedded in either colourless or tinted epoxy resin, depending on the application. Since the UV resistance of the epoxy resin is inadequate, the carbon fibre filaments are generally protected with two layers of clearcoat. The first clearcoat layer is intended to provide a visually smooth surface, and the second clearcoat layer is for UV protection. The latter is particularly important in the case of “visible carbon fibre”. Visible carbon fibre differs from topcoated carbon fibre in that the filaments are visible. A repair of visible carbon fibre only makes sense in the event of superficial damage which can be remedied by applying a clearcoat layer. In other words, the filament must not be damaged because otherwise the damage will remain visible. Repairing a topcoated carbon fibre component, on the other hand, does not call for any particular requirements. The standard refinish methods for metal surfaces or thermoset materials (SMC, GRP) incl. body filler can be used.

Since there are different application possibilities of carbon fibre reinforced plastics (CRP), three different applications are described in the following:

4.4.1 Topcoated carbon fibre 4.4.2 Visible carbon fibre 4.4.3 Carbon premium finish (if required)


Mercedes-Benz-specific refinishing processes4.4 Carbon fibre reinforced plastic (CRP) 4.4.1 Topcoated carbon fibre




Sand (steel with P80, aluminium with P150-P180, galvanised steel and solvent-resistant old paintwork with P320).


Prime rather large bare metal areas with EUROFILL before application of 2K primer filler PERFECTFILLER GREY / WHITE / BLACK.

Primer filler

PERFECTFILLER GREY / WHITE / BLACK 100 (vol.) 100 g D 70 / D 80 25 (vol.) 15 g FR 500 25 (vol.) 13 g


Potlife: 1 hour at 20°C


Spraycoats: 2 3 Film thickness: 50 – 70 µm 80 – 120 µm

Drying at 20°C 3 hours Drying at 60°C 20 min

or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 9 min




Further treatment After the first coat of primer filler, visible surface defects (e.g. pinholes) can be filled manually with a brush. After interim sanding with a random orbital sander (P400 - P600) or manual sanding (P800 - P1000) this step can be repeated until the desired result is achieved.


or ----------------------------------------------------------------------------------------------------------------------------

Manual dry sanding with P800-P1000.













or ----------------------------------------------------------------------------------------------------------------------------






Clear







or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min



Mercedes-Benz-specific refinishing processes4.4 Carbon fibre reinforced plastic (CRP) 4.4.2 Visible carbon fibre



Clean with PK 1000.

Sand with red sanding pad, soaked with PK 1000.


Clear (1/2)

CHRONOLUX CP 300 (vol.) 100 g H 420 100 (vol.) 36 g SC 820 100 (vol.) 28 g




Spraycoats: 2 Film thickness: 40 – 60 µm 1 – 2 min between spraycoats On vertical surfaces, apply one thin and one full spraycoat without intermediate flash-off (film thickness of approx. 50 µm).


Mercedes-Benz-specific refinishing processes4.4 Carbon fibre reinforced plastic (CRP) 4.4.2 Visible carbon fibre


Clear (2/2)

Drying at 20°C: dust-free: 2 hours ready for assembly: 3 hours fully cured: 12 hours

Drying at 60°C with SC 820: 15 min with SC 850: 20 min

or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min

Further treatment Finishing operations after specified drying times and cooling. After the first coat of clear, visible surface defects (e.g. pinholes) can be filled manually with a brush. After interim sanding with a random orbital sander (P400 - P600) or manual sanding (P800 - P1000) this step can be repeated until the desired result is achieved.


Mercedes-Benz-specific refinishing processes4.4 Carbon fibre reinforced plastic (CRP) 4.4.3 Carbon premium finish (if required)



Clean with PK 1000.

Manual dry sanding with P1200.


Clear (1/2)

CRYSTALCLEAR CP 300 (vol.) 100 g H 420 100 (vol.) 37 g SC 820 / SC 850 / SC 880 100 (vol.) 29 g




Spraycoats: ½ + 1 2 Film thickness: 40 – 50 µm 40 – 60 µm On vertical surfaces, apply one thin and one full spraycoat without intermediate flash-off (film thickness of approx. 50 µm).

Between the spraycoats no flash-off 3 – 5 min


Mercedes-Benz-specific refinishing processes4.4 Carbon fibre reinforced plastic (CRP) 4.4.3 Carbon premium finish (if required)


Clear (2/2)


or ----------------------------------------------------------------------------------------------------------------------------

(short wave) 8 min

Further treatment Finishing operations after specified drying times and cooling. Can be overcoated with the same product after the indicated drying time without intermediate sanding.


Colour matching 5.1 Colour code labelling on rating plate


The first step when colour matching is always to identify the colour by checking the vehicle rating plate. The location of the plate can vary, depending on the particular vehicle model. In most Mercedes-Benz and smart models, however, the rating plate is on the B post (see figures). Older Mercedes vehicles sometimes also have stamped metal rating plates which can usually be found in the engine compartment.

Older series Newer series

The figures below show the respective locations of the rating plates with the paint code for old and current smart series. The colour number (A) is shown on the rating plate and is divided into two parts: The first three characters indicate the respective specification code for the Tridion safety cell (1) The last three characters indicate the specification code for the standard plastic cladding (body panels, see 2)

A: Rating plate 1: Tridion safety cell specification code 2: Specification code for standard plastic cladding

Older smart series (450, 451) Current smart series (453)


Colour matching 5.2 Search and selection of the correct mixing formula


The second step when it comes to colour matching is, of course, to identify the correct colour formula (mixing formula). Hier können verschiedene Lösungswege eingeschlagen werden, die nachfolgend kurz aufgelistet werden. To be absolutely sure, it is recommended that a spray sample of the identified solution be mixed and compared with the vehicle (colour) before carrying out the refinish job. A colour variant may have to be used to achieve a better colour match.

The continuing R-M colour matching system Colormaster

The advanced R-M colour matching technology Colortronic 2

The internet-based R-M software Color Data Color Explorer 2 Shop Master

Further details on the R-M-specific colour matching product portfolio can be found on

www.rmpaint.com

www.rmpaint.co




Documents

Preface - XENTRY Portal · Preface . R-M Automotive ... 3.2 MB 1: Surface refinishing . 3.3 MB 2: ... Alubeam Silver Met. MB-0047 . 4.2. Tri-coat paint systems (example: hyacinth