There is a lot of good info here, but also some Really bad, wrong, backwards.
Arguing about the water is just plain foolish. In Oregon I ran it out of the tap. In Montana I buy distilled. Please wear a dust mask when you card, especially if your solution has mercury!
Here is a link to photos of my process. I won't answer questions, so please don't email. I hope some pictures help some neophytes… I've been rust bluing for almost 40 years. The sweat box was made as an experiment almost 30 years ago and never replaced.
http://finegunmaking.com/page60/page60.html

Last edited by SDH-MT; 03/01/15 12:59 PM.