I second the Autosol - that stuff rocks !!! . . . so here is something I learnt from an "old" Chrome shop guy years ago - they make a solution of "Bon Ami" cleanser, then wipe down the newly chromed bumpers and let it dry to a haze . . . wipe the haze off and totally new !! I have done this on the bumpers on my 74 Duster360, and it takes everything off the chrome but the shine !!!