I removed the rear seat to have the seat-back reupholstered. While I was in there, I decided to clean it up and apply some sound deadening. The original tar paper was in place so I removed it. There was some minor surface rust underneath, which didn't surprise me, but nothing serious at all. I cleaned that up and then, after thoroughly cleaning the metal surfaces, I applied Dynamat Extreme to the floor and trunk/back seat divider wall. I did not remove the vapor separator because, well, it'