I have some blued guns that are modern and I shoot a lot, so I tried another method and it is quite good. I would not recommend you do this, repeatedly,….in other words, if you intend to shoot the gun again, leave it alone. This is for those guns that are to be put away and become safe queens……..
I use Shooters Choice (it is really superior to Hoppe's….in my opinion. Whatever you do, do NOT mix them….the formulas are completely different.) Once I go over with a SOFT toothbrush and get the bulk of the powder burn off….I cut a strip of the 3M Scothbrite pad that is PINK & WHITE. The pads come in three levels of abrasiveness….the Green-Yellow is for tough use…..The Blue-Blue is for teflon surfaces, but the White-Pink is for Silver…..my thought was/is if it will not scratch silver it should be OK on blueing. Soaking the Pink-White cut strip and wiping gently works well to remove the burn rings.