Turn on a hose and rinse the RV thoroughly to remove visible dirt and debris.
Mix a solution of water and oxygenated bleach according to package instructions. Dip a sponge into the solution and scrub the RV. Oxygenated bleach will remove mold and mildew from the surface. This isn't necessary if your vehicle is free of mold and mildew.
Scrub the RV’s surface thoroughly with a degreasing cleaner and a sponge to remove all chemicals from the surface. Use a "free-rinsing" degreaser so that no residue will be left behind. Rinse the vehicle with the hose.
Apply scouring powder to an abrasive nylon pad. Rub in a circular motion. Scuffing the surface will create texture on the RV’s surface that will give the clear coat better adhesion. Rinse the RV thoroughly with the hose.
Dip a lint-free rag in rubbing alcohol. Wipe the surface of the RV with the rubbing alcohol.
Dip a paintbrush into the clear coat and apply with a light, even stroke. Paint in one direction to reduce visible brush strokes. Apply two to three thin coats of clear coat. Clear coat also can be applied with a high-volume, low-pressure spray gun. Only use a spray gun if you are comfortable using one.