I've made nitrile gloves into an almost compulsive habit. Whenever I get a car in for paint/body I made it a shop religion that no car ever be touched without them, owners of the car are no exception. The oils from anyone's hands could wreak havoc during paint, be it from deodorant, hair gel, tooth paste, grease from foods, driving cars that have ever been armor all'ed. Also, personal safety is a major concern. Many simple everyday body shop and detailing chemicals have unknown long term effects on human health. I don't trust the guy in white lab jackets telling me a product should be safe for everyday use. On another note, my hands are always clean and no prints on freshly waxed door handles!