i;ve never used pressurized vapor baths, for anything. I’d certainly stay away from pressurized vapor baths using heated solvents that are also rather flammable (that’s… got some exciting possibilities that I would let my worst enemy do first.) I’d use picture glass (or cheap ikea mirrors.) to build up a box. set it up outside where the vapors aren’t a problem.

alternatively, a cheap-ass-fuck stock pot with a glass lid will also work fine, but don’t seal it… and certainly don’t use it for food when you’re done.

as for if it should boil, it’s boinling point is about 80 deg. C, so if you’re seeing boiling, you either have somewhat impure MEK (which is fine,) or your temp measurement is off. It should still put enough vapor into the box that you can see it working though… it’ll just work faster.