Defeitos e danos na pintura

501-36-24 Paint - General Information 501-36-24 DESCRIPTION AND OPERATION TO BE UPDATED LATER Repair of damage: ‡ Droplet method before clear lacquer application. ‡ After clear lacquer has thoroughly dried, sand surface and re-paint. Spots Points rising up from the paint film. Cause/damage pattern: ‡ Metallic base paint sprayed too dry, so that the metal particles could not incorporate into the paint. The clear lacquer could not cover these vertical standing particles because the spray air was too hot or the booth temperature was too high. TO BE UPDATED LATER Repair of damage: ‡ After the paint surface has dried, lightly sand it with grade P800 sanding paper, clean with silicone remover and re-apply clear lacquer. Metamerism/color deviations Noticeable when identical color shades undergo a change of hue as the light source changes (daylight/artificial light). Different pigment composition between original and repair paint. Cause/damage pattern: ‡ Use of paints with pigmentation which was not compatible with the standard, e.g. a green can be formulated from yellow and blue, or directly from green. ‡ Use of an unsuitable mixed or ready made paint to re-tone. TO BE UPDATED LATER Repair of damage: ‡ Repaint using the correct paint. Washing out On paint which has been newly applied but not yet dried, the interaction of surface tension and very different specific gravities of the different pigments can lead to swirl-like turbulence which results in separation of the pigments. Cause/damage pattern: ‡ Layer too thick, paint not stirred enough. TO BE UPDATED LATER Repair of damage: ‡ Sand and re-paint. Loss of gloss Milky, dreary tarnishing of the paint with more or less even loss of gloss.