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Author: Anonym/Monday, January 1, 1900/Categories: Difetti di verniciatura
CISSING / CRATERING, FISH EYES
Paint repelled by contaminant forms craters like depressions with relief edges. Inspection with lens may reveal a small impurity at the base.
- Incorrect use of antistatic cleaning cloths that can contaminate the substrate. - The spray booth and/or the substrate are contaminated with silicone. - Contaminated compressed air (presence of water, oil,grease, wax). - Solvent contaminated spray gun when using water-borne products
Allow the film to harden: - Remove by sanding the affected paint, clean accurately and re-spray. - If the paint still forms craters, add a specific anti-silicone to it.
- Clean and degrease the substrate thoroughly before spraying the nex coat, using specific ANTI-SILICONE solvent. Remove the solvent with clean cloths before it can dry. - Check the spray booth filters and the oil/water separator and drain if necessary. - Alwais check the surface before spraying next coats; if necessary operate as indicated above. - Use only spray equipments perfectly clean. - Dont use products containing silicone in the spray booth. - Clean with suitable solvents and allow spray guns to dry when using water-borne products.
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