The repair process

Repair Process II

Part repair, damage or reconstructing of anticorrosion protection using reactive primer

Repair Process II

1. Tools needed for the repair

  • InterTroton or Master silicone remover
  • InterTroton or Master thinner for acrylic products
  • Sand paper (for the beginning, for dry) P120-P320, finishing P400-P500 (for dry) P800-P1200 (for wet) for the machine, grindstone, mechanical equipment (see the surface preparation), containers to mix products
  • Varnish tape, paper, cover foil to protect a vehicle (parts which are not repaired), antistatic cloth
  • Japanese putty knives to apply polyester putty
  • InterTroton or Master putty
  • InterTroton or Master acrylic primer, for some primers it is better to use a reactive primer to increase anticorrosion protection
  • Base coating (colour)
  • InterTroton or Master clearcoat

2. Step by step process

Substrate preparation

  • On a repaired part, do a thinner test (surface preparation)
  • If the result is positive – remove old coating up to bare steel, if negative – you can follow next steps in the process
  • Remove dust using compressed air
  • Clean the repaired part (silicone remover)
  • Cover not repaired parts
  • Sand a damaged part starting from a sand paper P120 – P180, remove corrosion thoroughly mechanically or manually (see surface preparation)

Reactive primer application

  • Using compressed air remove dust
  • Clean the repaired part (silicone remover)
  • In hard to reach places, internal and external side skirts, underbody and where steel is cleaned from corrosion apply InterTroton or Master reactive primer (according to Technical Data Sheet of a product)

Acrylic primer application

  • Then apply InterTroton or Master acrylic primer (according to the Technical Data Sheet of a product)
  • After hardening, sand the acrylic primer in a part where polyester putty is to be applied (sand paper for dry P180)

Putty application

  • Remove the rest of dust, using compressed air, cleaning with silicone remover (after a thorough remover evaporation)
  • Apply polyester putty in two layers with a correct time of drying (according to the Technical Data Sheet of a product)
  • Sand the putty with the sand paper P120-P180 at first, finishing with P220-P320

Reactive primer application

  • Using compressed air, remove dust, clean with silicone remover (after a thorough remover evaporation)
  • Apply reactive primer in sanded places (putty-primer-steel), according to the Technical Data Sheet of a product, the same which was used earlier

Acrylic primer application

  • In order to fill and isolate from reactive primer, apply acrylic primer – the same which was used earlier on a repaired part (according to the Technical Data Sheet of a product).
  • After hardening, sand the primer with the sand paper P400-P500 (for dry machine or manual), or P800-P1200 for wet (sanding the surface on wet, remember to remove water straight after sanding). We recommend sanding on dry.

Base coat application

  •  Using compressed air, remove dust and pollution, clean the repaired part and surroundings (silicone remover)
  • Cover not repaired parts
  • Clean the prepared part with the silicone remover, after evaporation the surface can be wiped with an antistatic cloth
  • Prepared base coat apply on the repaired part (according to recommendations of a manufacturer)

Clearcoat application

  • After a correct time of base coat drying (see manufacturer’s Technical Data Sheet) (using antistatic cloth, wipe dust or impurities from the surface)
  • Apply clearcoat (1,5-2 layers for VHS clearcoats, 2 layers for MS, HS clearcoats), see Technical Data Sheet for using a product

3. Warning!

  • Use only original products recommended by a manufacturer
  • Follow Technical Data Sheets of a product
  • Dry processing of materials is recommended
  • During works, use personal protective clothing
  • Use IR drying to speed up the drying process of materials
  • The temperature and moistness are crucial for products and the repair
  • On reactive primer, do not apply polyester products (putties, primers)


Use the products


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