To bigduke6.
I got the hot bluing setup.
When ordering I talked with the owner. He was a great help. One additional thing - NO ALUMINUM!!! Even a small bit of aluminum will ruin the whole tank of black oxide solution. And, yes, it is at 295 degrees and burns immediately if you get it on you. Face shield, Leather apron, Good gloves and face mask to keep dust out of your lungs all mandatory. It is not really as difficult as you think. My first gun came out perfect.