I just bought a 91 TT from the original owner. He had a bra on it since day one. When we took it off the seams of the bra at the corners of the bumper rubbed the paint clean off to the plastic, not mortifying but noticable. He kept pretty good care of the car but I don't think the bra came off for every washing. From the looks of it the bra itself caused the paint rubbing off regardless of it being spotless or not underneath. Of course this is after 10 years of the bra being on the car. Just my experience. Mark