Dave, opinions will vary, I will give you mine. For the first time rust blueing novice, leave all power polishing tools out. Polish by hand only with up to 320 grit, 280 looks really good as well. clean the rib matting with a small stainless wire brush, and all other cracks and corners you can't get to with paper, watch the bbl markings, go lightly.
final cleaning works best for me with Simple Green or 409, boil them before the first rusting, make sure the bores are clean.
Pilkintons is fine, I do all my carding with a fine stainless wire brush, .005 bristles I think Good luck, It is a lot of fun when you see the outcome, Frank
