The first thing you should do is to wrap a small bunch of Frontier pad around a brass bore brush affixed to a rod mounted in an electric drill. With an ample dousing of Hoppe's swabbed in the bore run the spinning Frontier pad up and down the bore about fifty passes adding more Hoppe's as needs be.
I think you will be amazed at the result. The bores will probably not be as pitted as you once thought.
Frontier pads will NOT remove metal.
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