Hi, I posted in Clydesdale forum but I thought I might get some response here as well. Every once in a while, I'm not putting on a lot of miles yet but I take a Scotchbrite pad or the same and give the rims a good scrub. To get the brake pad stuff off, lessen the noise / chatter and improve braking performance. Take a single cut bastard file to the pads too.
After I did that today I thought I'd take out my battery powered dremel with a moistened felt polishing pad, add some toothpaste (Toms Peppermint) and give it a mild polish. Then I dampened a shop rag, wiped 'er clean, then dry, very vigorously and took 'er for a quick spin.
Very nice! No noise from the dirty rims and great braking power.