Best way to remove bluing

[killathrilla]

[timdps]

I use white vinegar and soak for a few hours to overnight.

[Tom Slick]

Naval Jelly works very fast. I didn't have any rust issues when using it.

[Barabas]

I like using Evapo-rust. It will remove any oxidize surface finish, leaving you with bare steel. It also prevents rust for about two weeks if left to dry on the surface.

[smoothy8500]

In my experience Evaporust is the first choice, Birchwood Casey Bluing remover the second. Naval Jelly works well too according to a friend of mine.

[kendog4570]

Metal-Etch by Jasco. Mix per the directions and it will take blue off in about 1 minute. If your water is really cold it may take a little longer. Luke warm water works best. Available at any hardware or paint store.