Diablo-RCU: We used to use that at the lab where I work, I will try it on that exhaust that I posted earlier. We call it Dichloromethane, the paint strippers use it to remove paint from old furniture. Something you should be aware of is that if you expose methylene chloride to hot surfaces or an open flame it can produce phosgene do a google searh for it, nasty stuff.

http://www.jtbaker.com/msds/englishhtml/M4420.htm