As dyna suggested they are simple aluminum that would probably easily clean up. Plus you really don't know what the ones you are looking at have been through. You could most likely get a new set and spend a few minutes with a buffer and have them looking like chrome. Then shoot them with a good coat of clear yourself. Or just leave them uncoated but you would have to polish them often.
2006 V-Star 1100 Classic
Silverado windshield and passing lamps
OE Highway bar with custom mounting brackets
Kuryakyn Dually ISO Highways pegs
Barons Nasty Boy Slip-ons
Kuryakyn led headlight halo