[tychain99]

I just pulled out the back carpet in my 928, I taped off the the whole rear, and sanded out the battery well, and recessed area where the wheel sits. On top of the gas tank is a rubberized coating that is painted. I believe they used this under the carpets also, I was fortunate enough to be able to pop this coating off in large chunks with little effort. I did a quick sand, and taped off the whole rear of the car, and used a aerosol spray undercoating and re sprayed the whole back interior. my whole reason for doing so was the rust beginning to form inside the battery well. I will snap a few pic if interested.