You cannot go wrong with Pilkington's but you must be CLEAN and never touch with bare fingers metal during whole process. 320 grit is plenty fine enough. Use only distilled or rain water for the boils. Hang barrels on coat hanger hooks above bottom of boil tank. Card with DEGREASED 3/0 or 4/0 steel wool. Do about four repititions and blow barrels dry with strong hair dryer after each removal from boil tanks. Let age 24 hours after 4th repitition, then oil and set aside for a day or so. use blue remover rather than polishing rib, brush same with fine wire brush. You may not need to even polish barrels if there are not nicks or blems. Just use the blue remover first. Loverly, ain't it? Chopperlump.