I have brought this up few times and couldn't decide if I should give up the 3G. After talking with a few people, I want to give some body shops\restore places a try.
Went to a local Maaco showing the guy about the rust. He was telling me they really can't repair rust at that level. They can only do simple rust. So he redirected me to another local body shop that can do much more rust repair.
I went there and showed him the rusted areas and he was really shaking his head. He was very honest though and didn't even quote me any price.
I have the gut feeling that he is absolutely right things will get nasty once he takes the job and start opening up the panels.
My son said just drive it until it can't anymore and get something newer. The sentimental thingy gets into me and hope of keeping it a little longer is fading........