Re: Bluing?
This isn't answering your question...but, if I had an old rifle, I'd consider the reason for re-bluing. If collectable, the re-blue job will remove MOST of the value. If not collectable, the reason for bluing would most likely be appearance or "protection". For those applications IMHO you would be better served by one of the cured coatings...Teflon, Cerakote, or the like. They offer rust and ding protection. Bluing, while traditional, doesn't. Again, JMHO.