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501-36-23 Paint - General Information 501-36-23 DESCRIPTION AND OPERATION ‡ Polyester material not covered. ‡ Sweat from hands. ‡ Salts and minerals in sanding water. ‡ Spray air contaminated. TO BE UPDATED LATER Repair of damage: ‡ Sand away damage, matt sand remainder of surface, clean with silicone remover, fill and re-paint. Etching The base paint is etched by the clear lacquer. This causes the aluminum pigments to change their alignments. The color of the etched base paint seems more grey than that of normal base paint. Result is that the surface structure of the clear lacquer becomes increasingly more matt. Cause/damage pattern: ‡ Base painted too wet. ‡ No intermediate flash-off time. ‡ Layers too thick. TO BE UPDATED LATER Repair of damage: ‡ Sand and re-paint. Paint wrinkles/puckering Lifting/puckering of the paint surface. Cause/damage pattern: ‡ First paint not hardened through or can be etched. ‡ Areas of clear lacquer which were sanded through to base paint have not been not isolated with filler, or with unsuitable filler. ‡ Unsuitable substrate (e.g. spray can painting with TPA or nitro). ‡ Use of unsuitable primer, paint and thinner materials. ‡ Paint systems not matched to each other. ‡ In wet-in-wet process, specified flash-off times not adhered to. ‡ Synthetic resin top coat (alkyd resin) worked over too soon. TO BE UPDATED LATER Repair of damage: ‡ After thorough drying, completely remove the top coat together with the attacked substrate at the affected areas and re-create a new paint finish. ‡ Before applying top coat, rub down the complete surface. Cloud formation Differing, blotchy color/effect formations in dark/light areas of a metallic paint finish. Cause/damage pattern: ‡ Spray gun, spray nozzle, spray pressure not perfect. ‡ Varying spray viscosity, spraying method, flash-off times, spray booth temperature. ‡ Thinners not suitable.