I just got a Gibson Les Paul Studio. I took the pickguard off, and noticed a dent in the finish. On the surface of the pickguard, there's a silver screw that faces down towards the body of the guitar, which connects the small metal bracket to the pickguard. Underneath the pickguard, there's a small nut (affixed to the screw I just mentioned.) The nut/screw has been in contact with the actual finish, leaving this noticable mark. I've hardly played it so I doubt it's due to any excessive playing. Is this normal? It seems strange that they would make it so the nut/screw assembly would DIRECTLY contact the body.