Originally Posted by
crackle
Good quality paint will include good quality pigments. External house paints will have been tested under accelerated UV conditions and on rooftops, in hot sunny locations, etc so fading is not likely to be a problem. The only pigments I know are really short-lived are the fluorescent grades.
However, as a former paint chemist, I would find it difficult recommending any coating that was not developed specifically for the application, and that would include paints developed for painting houses being used for painting aircraft. We spent many years developing polymers and formulations for each type of use, and for that optimisation to be successfully carried over to a completely different use would be a stroke of luck.
Christopher