I took the old seal strip off my forward hatch. It was the hard foam used by HVAC equipment to seal it. The sticky is quite so, and doesn't want to come off. Acetone and vinager (which works great on epoxy, thanks!) dont touch it. Paint remover? I'm a little afraid to leave it on very long, as it will take up the epoxy too. I think this stuff is similar to duct tape residue. What takes it off?