VW Golf manuals

Volkswagen Golf Service & Repair Manual: Aquaplus design and multi-colour painting

Issue 05.14
To be able to execute fault-free design and multi-colour paintwork with Aquaplus non-metallic, metallic and pearl effect base paint, a number of special features need to be considered, and some special aids deployed.
Preparations:
Where a design is marked out on the base surface (surfacer, paintwork), no marker pens containing water-soluble inks must be used, so as to prevent »bleed-through« into the waterborne base coat. If this is not possible, the markings must be removed thoroughly using silicone remover -LSW 019 000 A5- immediately after the design has been masked off.
Masking the substrate (2-pack HS top coat)
You can use commercially available contour/decor fine line tape and masking tape for masking on 2-pack HS top coats.
Masking Aquaplus non-metallic, metallic, pearl effect base paint
Use commercially available contour/decor fine line tape and masking tape.
  Press contour and masking tapes carefully into place
  If masking wide areas, use masking film (to avoid marks).
  Never leave contour and masking tapes on the surface for longer than necessary.
Drying individual layers of water-based base paint
Oven drying is not advisable, as there is a risk of adhesive being transferred from the contour and masking tapes to the waterborne base coat.
The individual layers of water-based base paint can be dried using air nozzles or at increased booth temperatures. These are also the most effective drying methods.
The thickness of the individual layers shall not exceed 40 µm. Otherwise the film may be detached when removing the masking tape, the coverage may be insufficient or issues may arise during drying.
Multi-colour paintwork with insulation layer
To prevent »bleed-through« and colour distortion in the individual colour layers of multi-colour paintwork systems, it is advisable to insulate the individual layers with 2-pack clear coat.
The 2-pack HS Vario clear coat -L2K 769 K01 A5- cross-linked with fast-drying 2-pack HS hardener -LHA 021 004 A3- may be used for this.
To attain acceptable drying and coverage, the use of slower-drying hardeners is not recommended.
The insulating layer must be applied only onto the Aquaplus waterborne base coat.
The steps required are set out below based on the example of a 3-colour multi-colour paintwork system.
   
–  Apply first colour with Aquaplus waterborne base coat.
 

Aquaplus design and multi-colour painting

–  Dry base coat for at least 5 hours at +20°C.
 

Aquaplus design and multi-colour painting

Forced drying:
20 minutes at +20°C and 30 minutes at +60°C
Allow to cool sufficiently after drying.
–  Mask contours using commercially available tape or film.
 

Aquaplus design and multi-colour painting

–  Apply a thin, full coat of blending additive for Aquaplus -LVM 030 000 A2-.
 

Aquaplus design and multi-colour painting

–  Then, allow to flash-off for at least 20 minutes at +20°C.
  Aquaplus design and multi-colour painting
–  Apply second colour with Aquaplus waterborne base coat.
 

Aquaplus design and multi-colour painting

–  Dry base coat for at least 5 hours at +20°C.
 

Aquaplus design and multi-colour painting

Forced drying:
20 minutes at +20°C and 30 minutes at +60°C
Allow to cool sufficiently after drying.
–  Mask contours using commercially available tape or film.
 

Aquaplus design and multi-colour painting

–  Apply third colour with Aquaplus waterborne base coat.
 

Aquaplus design and multi-colour painting

–  Allow base coat to flash-off until it is matt.
–  Remove masking tape.
 

Aquaplus design and multi-colour painting

–  Apply top layer of 2-pack HS clear coat.
  Note
  •   Plastic film should always be used for any necessary masking, so as to prevent attachment of the already applied paint layers.
  •   Marks created by masking are eliminated by the subsequent clear coat application.
  •   For all other parameters relevant to the application of the specific product refer to the technical data sheet.
  P00-10032
Personal protective equipment:
  Adhere to the safety data sheet.
  Wear personal protective equipment during application.
 

Aquaplus design and multi-colour painting

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