Defeitos e danos na pintura

501-36-26 Paint - General Information 501-36-26 DESCRIPTION AND OPERATION Dirt embedded in top coat Inclusions of contamination in top coat or under paint layers, of different sizes and shapes (grains or lint). Optical adverse effect. Cause/damage pattern: ‡ Dust was not properly removed from the surface to be painted. ‡ Paint material not sieved. ‡ Function of the painting facilities not optimum. ‡ Filter contaminated. ‡ Wearing unsuitable clothing. TO BE UPDATED LATER Repair of damage: ‡ Single inclusions: after thorough hardening, sand out using 1200 - 1500 grade paper and repolish using a suitable silicone-free sanding or painting paste. ‡ Large area contamination: sand and repaint. Water marks Ring shaped marks appearing on the paint surface. Cause/damage pattern: ‡ Evaporation of water droplets on freshly painted and not yet fully hardened paint finishes (mostly only found on horizontal surfaces). ‡ Layer too thick. ‡ Drying time too short. ‡ Hardening faults or hardener no longer useable. ‡ Use of unsuitable thinners. TO BE UPDATED LATER Repair of damage: ‡ Rub down only slight marks with sanding paper grade P1000 - P1200 and then polish. ‡ For heavy marking, sand the surface matt, clean with silicone remover and repaint. Paint runs Wave-like paint run tracks in top coat or in an intermediate layer on vertical surfaces. Mostly in the area of swage lines, seams or openings (there they are paint runs, otherwise curtains). Cause/damage pattern: ‡ Uneven paint application. ‡ The specified viscosity was not complied with. ‡ Use of unsuitable thinner materials. ‡ Air, material or room temperature too low. ‡ Layers too thick. ‡ Spray gun (nozzle) not perfect. TO BE UPDATED LATER Repair of damage: ‡ After thorough drying, sand unevenness flat, if necessary leave to dry afterwards. ‡ Small areas of damage can be equalised using the paint plane, then sand, polish or repaint.