Black paint is a problem. Every swirl, every water spot, every brake dust trace is visible under direct sunlight like a crime scene photo. We tested five waxes on the Touareg's black paint over two Wisconsin summers — spring application through August heat into early fall. The standard for comparison was simple: gloss depth at 30 days, water sheeting at 60 days, and ghosting on black plastic trim. Most waxes failed at least one test. Butter Wet Wax did not.