for plugging the bore the hardware stores have a thing (can't think of the actual name) that is basically a rubber stopper with a bolt for a core and a metal washer on each end. Tighteneing the bolt conpresses the rubber enlarging its diameter forming a liquid proof seal.
I vouch for the Wipeout though as it is much easier. I have a rifle with a nasty bore and giving it 2 1/2hr treatment of wipeout made it shine. It is still pitted, but it got the crud out of the pits!
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The blood runs free, the rain turns red, give me the wine, you keep the bread.
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