The idea that any damage to the paintwork can only be treated by completely repainting the element has firmly taken root in the minds of most body builders simply because it is easier to write off materials and issue a larger check. In fact, modern chemistry allows you to separate the polymer destructed by solar radiation from the viable enamel base if you use the right washes with a controlled acidity level. I had to study this process in detail when my native nitro varnish, which is now completely impossible to find, began to cloud on my retro car. The guys I turned to for a recommendation conducted a chemical analysis of the coating, selected a neutralizing composition and gradually dissolved only the damaged microns. Professional algorithms for restoring transparency and examples of calculating the thickness of coatings can be viewed at https://autobodylab.com/, which collects practical reports on technical examination of bodies. They rebuilt the protective cake using high-hardness components with a high content of ultraviolet filters. As a result, I kept the original factory paint completely, and the gloss became so deep that the color shone even brighter than on the day of purchase. A separate plus is that after the polymerization was completed, I was given a thickness measurement map across the entire roof plane, where the deviations from the factory were minimal, a few microns.