I must confess that I'm actually a bit biased on the subject, because I'm not a fan of gold or brass on anything...jewelry, cars, even doorknobs. I just prefer chrome/silver/stainless/nickel/polished aluminum/etc.
I can actually visualize it on a white car, though...As long as it wasn't overdone. I agree with rjnonnie, the grille would be way out there!
Mike