My jeep was from Southern Idaho and was 99.9% rust free when I got it and I'd like to keep it that way. It literally had bare shiny unrusted metal in places where the paint had come off the frame when I got it.
Its been in St. Louis 3 winters now. Lots of surface rust was starting underneath.
I've painted everything underneath with Rustoleum Rust encapsulator before last winter, touched it up this spring, and put herculiner on the inside the first year I had it. That seems to be doing a good job.
I can shine a light inside the holes in the frame and see it starting to rust (when I got it, there wasn't anything like that in there). I'd like to do something inside the frame too so it doesn't rust from the inside.
Searching around, the Eastwood Internal Frame Coating seems to be the best stuff (aside from the cost).
Is there something cheaper that is really basically the same stuff?
How many cans did it take to do the inside of the whole frame?
What kind of prep did you do?