Although no one seemed interested, I decided to post the method of rust bluing that I employ. As I said in an earlier post, I cannot claim ownership of this method as I have seen it before on other firearms related websites.
First I acquired a two handled stainless steel cooking pot (from a thrift store), and PVC toilet flange from the local hardware store.
After drilling holes in the lid to attach the flange and let the steam escape, I assembled the boiling pot.
I then acquired a four foot piece of Schedule 40 PVC pipe that would fit over the flange.
I made sure that I could affix a dowel (or piece of a ramrod) across the top of the tube so that I could hang the barrel.
I put a vented lid on the top, although it's not really necessary. I sometimes put a paper towel over this lid to slow the steam from escaping the tube.
Then, fully assembled, it is a vertical, steam powered rust bluing tank. I use water from my dehumidifier to help eliminate unwanted minerals. Here in Lancaster, PA, we have lots of humidity in the summer. Any parts that will fit in the stainless steel pan just get boiled in the usual way, but the long barrels can be hung in the tube and steamed.