You can get brass buffing wheels that attatch to a drill at a hardware store for a few bucks. Just be sure to read the packages and get the correct one for brass. Brass is a soft metal and can scratch very easily, so you don't want to use anything too abrasive. As for the lugs, I'd check with Mapex to see if they offer replacements, if not I'm sure they can direct you towards a dealer who does.
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