Lacquer thinner and acetone are pretty much the same thing. I should mention at one point it ejected some burning black stuff. I wonder if it could be the lube I used on the minis. I was trying some synthetic grease or spray-on teflon. In the past I have recovered 50 cal power-belts, they appeared to be normal, not melted. I will look for some of the 54 belts, if they are not melted it would point to the mini lube.