Sanding, sanding, sanding. We sand everything. ACT I student Lynne is sanding the side of Ryan's truck bed and getting it ready for primer. Lynne will then prep the side for primer and shoot three coats of primer surfacer on it to get it ready for what? More sanding. It will then be wet sanded to prep it for paint. It only takes about 30 minutes to actually paint the truck bed. It takes about 8 hours to repair it, sand it, prep it and sand it again.