Some might find it of use. It's called AeroKroil. We have it at the place I work, and I used it to free a block once. Anyhow, doing another and it worked great before, so I was thinking I'd post it up. $16.00 a can, but well worth it. http://www.kanolabs.com/
Been using it since early seventys, real good stuff, works great, just give it some time to work. Dave
I read that too so I tried it. Works really well. My wife's a licsensed cosmotologist and bought me a gallon of acetone (nail polish remover) for 12 bucks from the commercial beauty supply, paint supplier wanted 20. It works way better than PB.