Paint Gloss finish problems
Vehicle Paint Gloss finish problems.In this section includes poor gloss, bloom, clouding, deadening and dulling.To Repair after film is quite dry, gloss can usually be brought up by using a fine compound and light polish. If polishing as above does not produce the
desired gloss, refinishing is necessary.
Cause
1. Poor hold-out of undercoat.
2. Application of colour over surface contaminated with wax, grease, oil, soap or water.
3. Applying colour over undercoat which is not thoroughly hard and dry.
4. Use of poor-quality, too fast, or incorrect thinner.
5. Mixing improper additives with finishes.
6. Drying in closed room. Failure to provide sufficient circulation of fresh air.
7. Drying atmosphere extremely humid or cold.
8. Overspray (see dry spray).
9. Compounding or polishing colour coat too soon after application.
10. Using compound which is too coarse.
11. Use of strong detergents, soap, solvent or chemical cleaners on finish.
12. Insufficient film thickness of colour coat.
13. Blushing (see blushing).
14. Application of enamel over heavily chalked finish.
Prevention
1. Use undercoat having sufficient hold-out (see hold-out).
2. Use wax and grease remover, according to directions, over surface just prior to applying colour coats.
3. Allow undercoat to harden thoroughly before applying colour.
4. Always use the correct, good-quality thinner as recommended by the paint manufacturer.
5. Never add anything to the undercoat or the colour except as approved by the manufacturer of the paint.
6. Films should always have plenty of fresh, clean warm air circulation (not draughty) while drying.
7. Always stir all materials thoroughly each time before using.
8. Do not use compound or polish on a finish before it is thoroughly dry and hard. If a sensitive nose can detect any odour coming from the film, then it is too fresh to compound.
9. Use compounds and polishes free of coarse, gritty particles, oily vehicles, and strong solvents and chemicals.
10. Do not wash car with strong detergents, soap, solvents, or chemical cleaners. Use mild detergent and water.
11. Apply sufficient film thicknesses of colour as recommended.
