While recently rumaging through my dads work shop I came across a cast iron lathe. The thing is proably old as the hills but i've got an itch to turn something, problem is every thing is stuck. The head stock thing will not spin neither will the tail. I've soaked all the nooks and crannys with PB blaster but the thing still wont budge, even got the perswader out (rubber mallet) but didn't do any good. Do you think trying some heat would loosen things up or would it trash everything?