OK, Tubby advertises 48 colors. Evidently is it only in South Africa. It is available in white but they can send you a tinting kit or tell you where to buy one. No thank you.
I am looking at this next. People have mentioned this on threads before. I could not find it here, but there is supposed to be stores in Houston that carry it.
This says plastics, fiberglass, and aluminum. AND tintable to deep colors with universal tint colors. What does that mean-universal tint colors?
I think I will have to go to a store in Houston to find these products though.