Fiberglass RVs have a protective barrier of hard resin polyurethane coating, known as gel coat, that protects the surface of your RV and provides the glossy appearance fiberglass is known for. Dirt and debris, sap and bugs, oxidation from acid rain and UV exposure can make your RV appear dull and dingy. A good cleaning before your next trip will restore the shine and seal the finish of your fiberglass motor home, tag-along or fifth wheel.
Things You'll Need
- Rubber gloves
- Cotton cloth
- Fiberglass wax
- Bug and tar remover
- Liquid laundry detergent
- Methyl ethyl ketone (MEK)
Sweep the RV roof with a broom. Be careful not to sweep any dirt or leaves into the drain under any roof-mounted air conditioning equipment. Use a ladder to reach all areas of the roof and avoid damaging the roof's protective surface.
Apply a bug and tar remover formulated for fiberglass to any of the areas affected by bugs, tree sap or white or black streaks caused by roof oxidation. Bug and tar removers safe for fiberglass can be purchased at any auto parts store or an RV supply warehouse.
Wash the fiberglass with a sponge that has been dipped in a solution of 1 cup of liquid laundry detergent and 1 gallon of warm water. Start at the roof line. Re-wet the sponge often to avoid dirt transfer.
Rinse the detergent off by spraying the RV with a garden hose. Allow the surface to dry naturally.
Put on gloves. Dampen a cloth with MEK and wipe down the fiberglass with it. Start at the top and working down the sides. Reapply the MEK to your cloth as needed so that the solvent removes grease and oils. Methyl ethyl ketone (MEK) can be purchased at a large home improvement store, RV supply store or any paint store that carries solvents.
Apply a fiberglass wax by following the manufacturer's instructions. The wax will fill any microscopic pitting in the gel coat and restore the reflective surface.
Tips & Warnings
- Waxing at least once a year will keep the gel coat surface strong and prolong the life of the fiberglass.
- If you RV needs restoring, use a fiberglass polish to remove a layer of the fiberglass and apply a rubbing compound with an electric buffer after completing the washing process.
- Always wear gloves when using MEK. It is a caustic solvent that can cause severe skin irritation.
How to Repair RV Fiberglass Exterior Damage
Damage to the exterior of a fiberglass RV shell is a common occurrence with regularly used recreational vehicles. The constant maneuvering of...
How to Restore the Gel Coat on a RV's Fiberglass Body
After many years outdoors, an RV's fiberglass outer skin will inevitably start to look a little bit faded. As it ages, fiberglass...
How to Clean and Wax an RV
Purchasing a recreational vehicle, or RV, is extremely expensive. Keeping an RV clean not only makes it look good but increases the...
How to Remove Oxidation From RV Siding
Recreational vehicles generally see a lot of sunlight, which over time causes the paint to oxidize. Oxidation happens to almost any material...
How to Clean a Fiberglass Car
Owning a fiberglass car means having to take special precautions when performing routine maintenance. Fiberglass vehicles use different materials in the finishes...
RV Cleaning Tips
Keeping your RV clean not only makes your vacation more comfortable, but it can make it safer and smoother. An RV may...
How to Clean Fiberglass
The best way to clean fiberglass is with a paste made out of vinegar and baking soda. Try using an all-purpose cleaner...
What Cleans & Polishes Decals on a Motorhome?
Dirt and debris accumulates on your motorhome while you're driving across the open countryside. This can leave your motorhome looking dirty and...