Carnauba waxes offer maximum shine and slickness, as well as great paint protection. The real appeal of carnauba wax is the nostalgic effect of rubbing the paste wax onto the paint. That's what enthusiasts have been doing for decades. Even as auto paint and waxes have changed, carnauba is the only choice for show cars and collectibles. Carnauba found its way into car waxes because it's the hardest natural wax on earth, it dries glossy, and has protective benefits such as water repellency and UV resistance.