Once the back of the car was back together I made brackets for the rotisserie to bolt to the bumper bracket mounts and got it mounted. I turned it so I could work on the top first where there were 5 rust through holes.  The entire top was striped to bear metal so all the rust damage could be treated  There was glue still on the paint from the vinyl top that was on the car that had to be stripped off.  Above and below are a couple of spots of the holes and rust ruts .  I used a 3M paint & rust stripper disc for paint removal.  Above all the holes are welded up and a rust treatment has been applied and below body filler has been applied. The top was then blocked sanded for a smooth finish.  This is rust holes at the bottom left corner of the back window and top corner of the trunk and below is after the repair is done.  This is before and after the right fender inner panel at the battery location has been replaced that includes a new battery tray

With the driver's door post damage repaired I started on the back of the car where most of the rust is, removed the rear bumper, trunk lid, tail lights & housings and gas tank. The gas tank was beyond saving with about 2 lbs of rust in it and the sender rusted in place so it was put in the scrap pile and a new tank & sender ordered. When the tail lights were removed the rusted metal between the lens's came out with them, the bottom of the tail light panel and the rear gas tank support brace were badly rusted. I checked and found that  replacement parts were available then removed the tail light panel and other rusted parts.  The rusted areas at the back of the car were sand blasted to determine how much metal had to be replaced.  The tail light panel rusted out on both sides.  Lower rear fender behind the wheel rusted in to the wheel well.  The rear of the trunk floor pans rusted out at the bumper supports above & below.  The rear corners of the