How to get rust off blueing?

Start with Break-Free or WD-40 and a nylon brush. Scrub it good and let it set overnight. Scrub it again then look it over with a good light and maybe some magnification. Extent of the rust will be much clearer then, proceed as gently as possible if desired.
 
for rust a tad deeper than the "dusty surface finger rub off stuff" use an old copper penny ,,,not a new one they ain't mostly copper anymore .
the older pennies will remove the rust but leave the existing blue in tact ,..
just my 2c worth.:D
go easy as always.:)
 
Wax It

An old trick my dear departed uncle taught me , once you get the rust removed take a black Crayola crayon and rub it vigorisly into the pits and wipe with a cloth cupping the barrel , then wax the whole gun . The wax keeps both air and water off the steel , ergo , no rust ! Can't have oxidation without oxygen ! Plus there is no odor , which we all know is not our friend in the woods !
 
Pennies minted 1981 or earlier were copper. Sometime in 1982 they started using zinc. Check the date before you start rubbing it on your firearm.

If you have some Romex or just about any other copper-colored wire in the garage it should be copper.
 
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