I really do want to get this back on track and will ask Harry to move some of these notes over to the vapor polishing thread. But, to answer your question. With the deep fryer, I am standing there the whole time. I turn the temp up to about 220 until the acetone boils and starts to condense on the lid. Then I turn the power off completely. Takes maybe a minute or two tops. Also, this is potentially dangerous. I only use relatively small amounts of acetone, keep the setup outside away from sparks, and wear decent PPP. Painter's mask, solvent gloves, safety goggles.