Truck beds get scratched and dinged if used to haul things. Over time, this and exposure to moisture and sunlight can damage the finish. You can give your truck a new look while at the same time protecting the bed from rust and scratches. If you paint the bed with liner paint, you'll also be adding a softer, skid-resistant surface that will help protect whatever you haul in your truck.
Lay the tailgate down and sweep out the truck. After sweeping, spray the whole bed down with a garden hose. If the truck bed is exceptionally dirty, use a mild soap to scrub it down. After it is clean, let it dry before proceeding.
Use sandpaper on the entire truck bed. If you have a power sander, this will take less time---but it is not necessary.
Use brushes or a roller brush to apply primer to the truck bed. Wait until the primer has dried before continuing.
Pour bed liner paint into a large roller pan. Roll a short-knapped roller in the paint until completely coated. Do the entire back side (near the cab) first.
Paint the sides about one fourth of the way toward the tail of the truck. Then paint the truck bed floor, also one fourth of the way to the tail gate. Paint the sides again, in sections, followed by painting the floor of the bed, until you've reached the tail gate. Climb out, paint the inside of the tail gate and let the first coat dry.
Put on at least two more coats of bed liner paint. Three coats should be sufficient, but you can even apply a fourth if you choose. Let the paint dry completely (it may take a day or so) before hauling anything in the truck bed.
