Join Date: Apr 2007
Location: Lemont, PA
Bikes: 1993 XO-1, early 1980s witcomb fixed gear, 1993 MB-1 singlespeed, a Surly 1x1 with pugsley front end, trek 520 converted to 650b, Coppi lugged road bike, Schwinn Crisscross townie
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unfortunately for you, the crank is anodized, so lightly sanding and polishing is out of the question, more or less. if you were nuts, you could remove the anodization and then take some fine 400 then 600 grit sand paper, sand out the scratches, and then polish the crank with some simichrome or mother's aluminum polish. but if you did that, it would look like you did that, and the other parts wouldnt look the same, and that would be bad, from a selling stand point.
leave the scratches. its tiagra, not a mint condition 1960s record grouppo.