I start with a set of jeweler's files, to remove the digs. Then I scrub the file marks out with 180, then 220. Then I start polishing with 320-400-600. Then some 0000 steel wool with Mothers mag cleaner. Then a rag with more Mothers. Remember that the part more than likely had clear anodizing to begin with, and so you will at least have to remove the anodizing from a whole plane of the part, to make it look okay. If you're gonna strip and polish the whole thing, Oven Cleaner will take off all of the anodizing (and makes your part smell lemony fresh, too). If I am only removing part of the anodizing I will often use a polishing wheel or felt nubbin mounted in a dremel, to speed the removal thing along. With the tool, I've tried various things, but again, Mothers seems to work about as well as anything. Practice on a Japanese crank before moving on to that Campagnolo Pista with the 151 mm bolt circle.