I have a 75 CJ 5 and I am trying to get it down to bare metal. I have bought two different types of stripper, one being the aircraft stripper and the other one was another aircraft stripper but made by a different company. NONE of these worked, so I'm trying to figure out if they made some kind of super paint and primer back in the 70s that won't come off. I have done the angle grinder with a wire cup brush but you can't get in all the places. I'm planning on using POR 15 and you have to get it down to the metal for it to really work. I'm down to my last option and that's to get it sand blasted, but I'd rather not do that. Anybody out there every have these kinds of problems, also what can I do to get this paint and primer off this jeep???