Prepping Bumper for paint.

I used 80 grit flapper wheel on a grinder and lightly went over the bumpers. Then sprayed 2 coats of epoxy primer then 2 coats of 2k high build and sanded smooth. I also used the flapper wheel to knock down the welds from where I welded in my bumper bolts and filled in the slots for the bumper jack. so the bumpers are now smooth.