Salvaged the burners from a small propane kitchen stove and made a rack to set my tank on. Works great but only gets the water in a 40 inch tank up to the bubble stage. Not a rolling boil. A little less heat will do the job.
I use rust blueing solution that requires heat for the application so I use the boiling tank to heat the barrels. The water evaporates immediately when they are removed and it gets them hot enough to apply the blueing.
After rust browning dozens of muzzleloader barrels one trick I use is to scrub the barrels clean with hot soapy water and then etch them with, "The Works" toilet bowl cleaner.(hydrochloric acid). The kind in the gray bottle. Then scrub again with the hot soapy water(dishwashing detergent). The browning solution takes an immediate bite into the metal and seems to be a little more even.
