Just thinking out of the box.
Toaster oven works fine, but this might be an idea.
Friend gave me his broken pancake air compressor.
Took everything worth saving off, and left with a nice, solid, round semi sealed, container.
If I cut the top 1/4 off, insulate the inside with plaster of paris, install an oven element with control, and a thermometer, and find a grate to fit
I would have a lift off top oven.
Would make loading coated boolets easier. less chance of tipping over.
Probably no better than the toaster oven. Would take up more space.
Plus side is I could also use it to coat other small parts.