Some of those look to be in structural areas. I would proceed with extreme caution.

If I were convinced I wanted to keep the car, I would cut all that off... (assuming that's even feasible), weld new metal in, treat with Miracle Paint and/or POR 15, and go from there.

However, just looking at the pictures, I'm thinking that you've got a parts car, I'm very sorry.

Packer

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83 240D - 4 speed manual - Manilla Beige
189K miles, Tachometer mod, cool wooden shift knob from PeachParts, CocoMats, Original factory paint, manual windows, manual sunroof. Starting to add AudioWrap to this car too!