blued it and now it's rusting
One of my dad's old shotguns was in his barn and needed refinishing badly. So I rubbed the rust off mostly with steel wool, and then used some Birchwood Casey Super Blue on it that I got from a local gun dealer. It turned out real good totally blacking out the metal after a few coats. Then I rubbed it down with some gun oil and propped the barrel up in the corner in the house. It's been a week now and it's already starting to rust again. If anyone can tell me how to correct this I would appreciate it very much.