Eastwood makes some good stuff, such as their rust encapsulator and internal frame paint. Application is easier but not sure of longevity unless topcoated. Prep is key for any paint product. You may get away with out using their Metal Ready for POR on rust but you still need the Marine clean to get rid of dirt and any oil type residue. Bare metal needs both. Metal ready is an etching product that creates teeth for the paint to grab hold of, since there is no old rust to grab.
Going with just a run of the mill primer (like rustoleum) and top coat will last a much shorter time because they don't have the sealing properties these epoxy or urethane based products do. Rust needs air and moisture to thrive so you need something to seal these both out. I've even read that some "primers" will act like a sponge around moisture because they are only formulated to grab a surface, not seal it, they let that up to the topcoat.
The end of a defining era.... JEEP R.I.P. 1941-1986
My frame off Re-Build: (the 4 year saga....)
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