I went and poked around in my trunk where I had installed some B-Quiet Extreme. The instructions say you can apply it w/out cleaning the surface, and this is a big no no. It doesn't stick well to anything, especially the metal (duh). The stuff I put on the clean dynamat and metal is sticking just fine, although not quite as well as the dynamat. If I were to attempt to pull up the B-Quiet, with some doing I could probably take off entire pieces leaving little on the car. The Dynamat is more difficult to do this with.