Just tried the crock pot and Anitfreeze method on an old OS SF .46. It worked great. Took about eight hours then just a quick clean up with some water (Ethylene Glycol is very soluable in water) then a little after run oil on all the parts. I did take the head, backplate, muffler and carb off and I did not put the carb in the pot. All it took to get the rest of the little spots off was a good stiff bristled toothbrush. Worked like a champ.

T.