edit: just reread the question, no black? probably polished alum, gold, or blue anodized i guess. Anodized looks great and will outlast any paint.
1
Black is my fav.
Anodized black is my favorite method.
2 stage base and clear, gloss is my second best.
Matte/ flat black is ok, but i prefer gloss, flat black reminds me of rattle can.