Here is how I do it:
Plug the vent & the end of the barrel.
Caution: You need Heavy leather gloves, a long sleave shirt, long pants, shoes, etc. as to protect yourself from being scalded with hot water.
Boil 3 quarts of water with about 12 tablespoons of baking soda in them. Now I mean a rolling boil, not just hot. Make sure the soda is mized & not laying in the bottom of the pan.
Put the muzzle end in the sink & hold the tang & pour the water down the barrel slowly & the entire elngth but most of it at the upper ends as it will run down it, now reverse ends of the barrel & pour again to get all of the tang.
Have the hot water faucet running & hot & just rinse off the barrel now & lay the barrel down on a paper towel & in just a minute it will be dry. (this keeps you from having the baking soda white streaks on the barrel)
Take Kiwi Brown Shoe paste wax & Liberally wax the barrel by hand, insuring you have melted globs of it all over. (Note some guys use beeswax for this, I like the shoe polish the best)
Now fold up a paper towel to about a 2" square & put a glob of wax on it & rub the bejesus out of the barrel while it is hot.. Take the barrel to let it cool. Go back in about an hour & rub it down again.
That evening, take the plugs out of the barrel & swab the bore good & dry & relube it in there so it will not rust (condensation from the hot water?)
Now rub the barrel down again with the waxed paper towel square. Now we are not rubbing it to a shine, use plenty of wax & keep it wet & we just want to keep it sealed.
Rub it down good again 2 days & that usually does it. Now you can oil it or whatever you want & it should not rust any more. When you oil it each time some of the shoe polish will come off on you oil rag, but don't be alarmed as it will bleed this for quite a while & it is OK, it is just coming out of the pores of the metal.
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