I'm thinking about the setup for bluing the barrel. I could repurpose one of my 140000 BTU/hr propane burners and pot from my brewery to make a stable platform for a PVC steam tube, use a scrap piece of sacrificial plywood for the lid.
Or, I could buy a wallpaper steamer at $60 for the steam, and save the time disassembling the brewery (it's all hooked up to a control panel and automated).
Or, I could use a water heater element in the bottom of a heavy wall pvc drain pipe
https://gunstreamer.com/watch/electr...EYEMhmdE2.html

Note: If the video doesn't play, your ISP likely blocks gunstreamer.

I'm leaning towards the water heater element and boiling, unless my cheap hot plate will boil a couple inches of water vigorously enough to create enough steam.