The worst thing that can happen to this camper is for the roof to leak. This camper is about 10 years old. The roof is in fair condition. It won't be long before hairline cracks grow letting water inside. So, we coated it with Hercules Products RV Roof Coating-White.
Step 1: Wash it like you'd wash your car with some strong soap, a brush and water - or it could be pressure washed. It was very satisfying to see all the grime coming off leaving a clean surface.
Step 2: Caulk any large cracks or obvious problem areas. Be sure to let the caulk dry before coating over it.
Step 3: Trim the outside perimeter with a brush. Use painter's tape on the edges if needed.
Step 4: Spray Hercules Products White Rubberized - Aerosol on the hard to reach areas or for touch up.
Step 5: Roll on the RV Roof Coating - White over the entire roof. It covered so well that we decided to apply only one coat this time. It took 1.5 gallons to cover this roof.
