74 power wagon dream truck...

Do they seal it with epoxy ?
No.. and that's not literally blasting the entire cab and the entire doors...
That's blasting the entire bottom of the cab about 80% of the inner floor around the window openings and a couple other small spots. And just the bottoms of the doors and any other little rust spots. Part of the tunnel that I'm going to give them and all four door hinges.. I want to see what's left so I can weld in the floorboards and patch any other places that need it. I'm going to drop it off and pick it up on a nice warm sunny day and put it back in my garage. I'll probably buy a few cans of a two-part primer and hit around the window edges and places I'm not going to be welding and then try and give it a light dusting on those areas...
I'm not concerned about flash rusting if that's where you're going..
I'll be trying to save for the body and paint work ASAP..