In that case, you can build an "oven" for baked on finishes. Find a larger diameter metal pipe and some space heaters.
Use a brass cleaning rod to run through the barrel, then suspend you're barrel using other wires tied off at the ends of your "oven".
Two ceramic space heaters, one on each end, should get the heat up enough to do it OK. Optionally, a bigger one aimed at the pipe will do also, and likely provide convection.
Let me know and I can draw a pic. The one I used is long since been converted to something else.
Cold blue just doesn't work for me.