I began with the magazine tube and lever, which I initially cleaned with Birchwood-Casey (B-C) Blue & Rust Remover. Then I polished them using the Scotch-Brite-type pad that came with the B-C Perma Fin kit, de-greased them twice with CVA Old Tyme No. 3 Degreaser while wearing gloves, and began coating them.
I've decided to talk about the stock refinishing in another article, so I'll skip ahead to prepping the parts in the photo above. For smaller parts, I used a Dremel tool and some rubber abrasives from Matz Rubber Co. Larger parts got a dose of the B-C Blue Remover.
I used up a few Matz pointed rubber tips polishing the parts. I used red (fine) cone-shaped tips for the bulk of the process, and was very pleased with the results. I picked up a kit of these abrasives at the 2003 SHOT Show, and have found that they work well for polishing gun parts. Just be sure not to get crazy with any abrasives - you want to remove the finish, not the metal.
Next, the parts got polished with the abrasive pad, were degreased, and the larger ones were hung up for spraying.