RE: Birchwood/Casey perma blue
I've had good results with the B-C Perma Blue. About 7 years ago I reblued on old Winchester single-shot .22 rifle with the stuff. I applied it to the gun as the directions stated, and the finish came out very nice. I have yet to have any problem with the bluing wearing thin or the gun rusting, but then I am a stickler for keeping my guns oiled or wiped down with a silicon rag.