(Silicone Contamination, Cratering) Small circular, crater-like openings in the finish.
Common Cause
Contaminations ① Surfaces contaminated with oil, wax, silicone, grease, etc. Silicones adhere firmly to the paint film and require extra effort for their removal. Even small quantities in sanding dust, rags can cause this type of failure. ② The remains of soap, detergent in surface cleaning. ③ Use of silicone-containing polishes in proximity to the spray area. ④ Contaminated air supply, spray gun, other tools and equipments for application.
Spray in too high air pressure, hold the spray gun too close to the surface.
Prevention
Thoroughly clean the surface with wax and grease remover.
Avoid using silicone polishes in proximity to the paint shop.
Install an air filtering system that removes and prevents oil and moisture contamination.
Regular maintenance of the air supply.
Ensure that the spray gun and compressed air equipment is properly maintained.
Repair
(1) For mild cases, respray the affected area right after the flash off time with paint added fisheye preventer.
(2) In severe cases, sand the affected area, clean thoroughly and repaint.
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