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adhesion defects can only be noticed after an Cause/damage pattern: • Substrate not adequately prepared (rust, grease, moisture, sanding, cleaning). • Unsuitable material used. • Drying times, flash-off times too short. • Base paint not sprayed wet-in-wet, instead the intermediate drying times were too long. • Failure to intermediate sand. • Condensation formed because of temperature fluctuations. • Unprofessional preparation (especially on plastics). • Overheated CDP/intermediate filler. Repair of damage: • Sand out the damage and recreate the paint finish. Create the paint finish strictly in Adhesion defects in clear lacquer. Clear lacquer detched from base paint. Cause/damage pattern: • Base paint layer too thick. • Intermediate and final flash-off times of base paint too long. • Incorrect mixture ratio clear lacquer/hardner. Repair of damage: • Refinish sanding and recreate the paint finish. Sanding scores Single or wide area clusters of scoring or sanding Cause/damage pattern: • Stopper sanded too coarsely. • Filler sanded too coarsely. • Filler not thoroughly dried bfore sanding. • Old paint sanded too coarsely. • Soft elastic substrates, e.g. TPA base, treated with thinners which was too aggressive and • Top coat applied too thinly. Repair of damage: • If the damage pattern is minimal, after the top coat has dried fine sand the paint surface and • If the damage is great or on metallic paints, sand the paint surface or substrates and if necessary G468093en 501-36- 20 Paint - General Information 501-36- 20 DESCRIPTION AND OPERATION 201 |