yeah for the chrome I would scuff the hell out of it... use a wire brush attachment on a drill... then use a scuff pad to make it sure it is all scuffed.... then clean it with acetone or rubbing alcohol.... then let it air dry and put down some self-etching primer, then bedliner, last clear... and do each coat in thin coats building up the layers.... remember slow and steady.... prep WELL and then paint in thin layers....
I'm gonna be doing my tan soon.... I hope... and I am doing almost the same steps except gonna use sandpaper on tan to scuff then use adhesion promoter instead of self-etching primer.... then bedliner, gloss black spray paint and last many coats of clear....