I dont know about cleaning a peice in a bath tub but when my grandfather was in the service they'd gum up the Barrells with cosomoline or somthin like that [ I forget the spelling] and the only way to get that stuff out is with gas so you'd sneak out to the gas station cover your rifle and your self in gas and sneka back on post this was after WWII [where could you get gas back then]
DOnt use a bath tub Gum out and CArb CLean do the trick just fine.
Ever get....
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