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Pinholes

Definition

Small holes in the paint surface caused by pores and voids in the plastic. This problem often appears on soft, flexible parts (for example, polyurethane rear spoilers) and glass fibre-reinforced plastics.

Nadelstiche

Causes

  1. Expansion faults or foam holes in the plastic from production
Nadelstiche
Pinholes due to pores in the plastic., 20 x magnification

HOW TO AVOID

2. Thoroughly check the plastic part for pores before painting. Then fill the pores using Glasurit 839-90 Plastics Body Filler grey.

REPAIR

Porous paintwork can, in principle, be repaired using the pore filler wiping process. Denib the surface, fill the pores with 839-90 and refinish the area to be painted. Note: too many pores in the plastic will make it very difficult to paint. It is important to check the plastic for pores thoroughly before painting.