Has anybody done it? Ive been trying but the rust wont convert to black no matter how long I boil it. Ive given it about 30 cycles, and its only a light grey. Briwnells says just keep going, its their formula im using but its a couple of years old. I called anther comany tday that makes rust bluing solution and he told me Rugers dont rust blue because they are cast.
Im using distilled water to boil.
