How fine a finish do you want? I'd probably talk to local powdercoaters, ask if they can match for colour, and what preparation they recommend, which i'd expect to be some sort of blasting. ... Is it just a matter of spraying paint on top of the existing black colour? No. any preparation needed? Yes. For painting there's probably some aphorism such as the quality of preparation being 90% of the quality of finish. Watch some Wheeler Dealers or American Hot Rod! :-) ... what to do with the 2 stickers on the diagonal bar? Do you want the certification stickers to show for competition use? If not I'd remove them as part of the preparation, and start with WD-40 and a nylon brush and my fingernails. Jonathan PS: I have a blind spot about wrapping. Is that a contender for this job?