With the patch panels tack welded in place, I sprayed the repairs top and bottom with self-etching primer and allowed it to dry for a few days. Durabak should only be applied to fully cured paint. To prep the bed, I roughed up the area to be lined with sandpaper and washed the bed, allowing it to air-dry for a day. Then I degreased the whole thing with Specialty Thinner by Crown. Durabak strongly recommends using Xylene, but mere mortals aren’t allowed to buy that product anymore in Commiefornia. If you don’t live in the land of nuts and flakes, by all means, grab some Xylene and go to town.