if you have time chemical strip the paint off...blast off etc...if you use paint stripper then you have less bs when it comes time to balance / polish...the polish and buff effort pays off...at the same time a chrome wheel is less maintence with a similar shine. I have polished frames and wheels...is you keep up on them / wipe them with mothers or some other brand they will look like a mirror. silver paint is far apart from polished Al or chrome. chrome gets dirty the same way a painted or polished part would + it chips like paint would...the polished parts can be sanded and buffed out...you would have 2 hrs max to buff black painted wheels to look like mirrors...$30 worth of sanding discs and buffing compound / pads