Uhh, that's right, I did snag a one-serving electric slow cooker that someone was tossing (still works) that I was planning for that. But the on-bike chain cleaner and lube has been SO much faster and easier. I only remove the chain if I am replacing it.

I wouldn't put anything that is remotely flammable, in contact or close to a heat source, especially inside. Once the wax is liquid, there's pretty good convection circulation to keep it all liquid, unless with your wok shape, higher up in the wok gets a lot cooler.

For my camp stove, they make really cumbersome and bulky "heat exchangers" that clamp around the outside of the pot, to increase efficiency. I use instead, this kinda cylindrical "tent" made from woven fiberglass possibly, it's designed for an "outback oven", it fits over the pot side and lid with a small opening on top for the thermometer.