Prep.. clean Jeep and pinch seam area... I didn't sand anything... etc..
taped it, removed rails... cleaned the pinch seam area again with wet wash cloth.
Masking paper installed.. and more blue masking tape in areas that needed it.
applied several coats.. of Rust-Oleum Truck Bedliner.. ~$7/can used 2/3-3/4 - Autozone
installed LOD sliders several days later.
highly recommend it...
Love the look and I think it adds a little extra protection....