I thought about the car, but we're into Fall here, not sure I would get the temps I need. I have a solar oven but I can't control the temperature well enough.
To unstick the presser foot bar I had to get it hot enough such that I couldn't touch the front half of the machine without gloves.
There's nothing to melt or catch fire, I figure I'm heating it up quite a bit with the heat gun, what's the difference if I reach the same temps in the oven? Put the machine in a foil roasting pan, 200-225. I don't know. My enable did say if I couldn't get it going I could part it out, so I'm not sure I have anything to lose.