Re: cold blueing
I left a wet H&R rifle in a gun case for a week, and found light rust on the barrel. I bought a product called "Wonder Blue". Tried cold bluing products before, but was never satisfied with any of them. This one is different. I wiped the rust scaling off with 0000 steel wool, then followed the directions. You heat the barrel lightly with a propane torch and then apply this stuff by swabbing it over the barrel. It actually took me 15 applications over several days, but the entire barrel now looks very good. You could not tell it from new, and it does not come off.