So I'm designing my CP overlay, and I have some questions that may be better answered by the folks offering printing services, but I thought others might know- so I'm asking.

Basically, what are my options as far as colors? Is it possible to print in white? Are metallic colors possible?
I know they have a vinyl that looks like brushed metal. Could I get parts of a CPO printed on that?
I'd like to find out what my limitations are before I get this thing designed and find out I can't get what I want...