best rust converter?

I'd like to think if you strip and clean with a wire wheel it, wash it really good, the epoxy will work, it isn't a wuss. It's epoxy. For welders; Look at my build and decide. Did the whole thing with a HF flux welder. They don't like long flat areas, besides that your golden. :)

PS: Rustoleum bar-b-q paint works great as a weld thru primer. :D