A clean barrel and a pitted barrel are different things. Even a pretty badly pitted barrel can be cleaned. It will not be shiny, but it is possible to get almost all the crud out of the pits. The Outers electronic cleaner does this well, and the barrels are clean! They still don't look good but they are clean. No amount of cleaning with anything will restore metal that is rusted away and make a pitted barrel shine.
Jim
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