bug and tar removal, citrus cleaner, goo gone, goof off, and rubbing alcohol. The adhesive I'm removing is from a Reiger kit that I removed. There is ahdesive stuck on my car where the side-skirts were. Is there are method that will take this stuff off? Nothing seems to eat through this stuff - its almost like caulk instead of just adhesive. What can I do? To make things worse, this stuff is on the gravel-gaurd texture stuff that's on the bottom of the cars. Any help would be appreciated, I'm at a dead end here. Thanks!!