Wanted to get an opinion on what I am thinking about doing on my 1 ton frame. I was thinking of knocking off the rust with a wire wheel on an angle grinder. Then coating the frame with ospho. I wanted to epoxy prime then paint with chassis paint.

However I'm not sure the ospho and epoxy will play nicely together. I do not want to sandblast the frame for several reasons. After the ospho is dried should I wirebrush it again and then epoxy, or skip the ospho and clean it up with the grinder and then expoy prime? I'm a little unsure of my plan of attack.