At one of the last Atlanta Auto Exhibitions where Isuzu still had a booth, the exhibited two Axiom concepts - one was a convertible in yellow and the other was a sport model in red - both used a special reflective paint - the rep said that it contained crushed glass. The effect was similar to a metallic, only the colors were bright instead of having that silver sheen. I think if you're doing a custom job it should be a custom color (agreeing with those who have already posted) like red and if you can pull off an effect like those Axioms it would be particularly special. Just my 2 cents.

-- John