Just be careful with the acetone mix. Acetone is very flammable stuff, and the vapors are pretty powerful too! I usually soak things with PB blaster or liquid wrench, let it sit for a while, then warm it up with a small propane torch. Get's em loose everytime! I always reassemble with a dab of anti-seize to prevent things from locking up in the future.
Yeah, was considering the volatility factor! Seems like Liquid Wrench...of all the readily available penetrants...is probly the way I'll go. Altho I do have a small bit of Mouse's Milk that Tugla sent me which I use only in dire emergencies! :biglaugh: