Car Paint Fish eyes defect Paint problems

Fish eyes problems in vehicle spray Paint. The cause is Surface contaminated with silicone, wax, grease or oil. This is not an easy problem to resolve without the preparation as below.

As many modern waxes and car polishes contain silicone, which is today the most common cause of fish-eyeing of fresh paint coatings. Silicones adhere strongly to the paint film, and extra effort is required for removal. Minute quantities of silicone in flatting dust, from contaminated rags, or even from car polishes sprayed at considerable distances from jobs ready for painting can cause this trouble.

Prevention
Clean surface thoroughly with wax and grease remover before flatting operations. Be sure to clean an area several times larger than repair area. Use plenty of wax and grease remover on clean rags. Do not allow to dry by itself, but quickly wipe dry with new, clean rags.

These rags should not be used again on any surface to be painted, since the slightest amount of silicone contamination will cause trouble. Proceed with flatting operation, being careful not to touch or flat into uncleaned area. Clean off flatting dust and do all blowing off with air at this point only.

Repeat wax and grease cleaning operation carefully. Treat bare metal areas with metal pre-treatment and rust remover. Tack off and start painting. A simple test for silicone on a surface consists of spraying black or a dark coloured air-drying enamel one thin wet coat over a small area. Presence of silicone on surface will usually produce immediate formation of fish-eyes in the wet film. Wipe off with solvent cleaner before the test spot dries. This test is not infallible since the test section selected may not have any silicone on it for some reason.