I thought I would share as I'm sure there are others in the same boat. I'm working on a 72 FJ40, with a rust spot near the tailgate. It was sprayed with DIY liner 20 years ago and is failing. After some research, I tried Citristrip paint remover, and I am impressed! Not only did it work amazingly well, but there are also no toxic fumes to deal with. I will reiterate it is very important to cover the working area with plastic while it works, we had a storm blow through and blew the plastic off one corner and it did not work nearly as well. Not a big deal, as you just reapply and cover it for another 24hrs.
Happy wheeling!
Happy wheeling!