RV Exterior Cleaning and Wax Guide

Washing an RV is nobody's favorite chore. It is big, it takes time, and you always miss a spot on the roof. But the alternative shows up fast on RVs that never get washed and waxed: chalky oxidized fiberglass, streaked aluminum, faded decals. A proper cleaning at least twice a year makes a dramatic difference in how the exterior holds up over the years.

Washing: The Right Way

Use a cleaning product designed for RVs or at least one that is safe for your exterior material. Fiberglass, aluminum, and painted surfaces each have different needs. A general RV wash from any camping store works on all three and will not strip wax or damage decals.

Work from top to bottom so dirty water runs down over surfaces you have not cleaned yet. Use a soft-bristle brush on an extension pole for the roof and upper walls. A standard car wash mitt works for lower sections. Rinse everything thoroughly, soap residue left to dry in the sun causes streaking.

Waxing: Protection That Matters

Wax creates a barrier between your RV's exterior and UV rays, rain, road grime, and oxidation. On fiberglass, a good wax keeps the gel coat shiny and prevents that chalky, faded look that makes an RV look decades older than it is. On painted surfaces, wax prevents fading and peeling.

Apply wax after washing, once or twice a year. A polymer or synthetic wax is easier to apply than traditional carnauba and lasts longer between applications. Work in small sections, apply a thin coat, let it haze, and buff off. The roof needs wax too if it is fiberglass, that is the surface that takes the most UV punishment.

For oxidized fiberglass that has already gone chalky, you need a rubbing compound or oxidation remover before waxing. This is a more aggressive product that removes the damaged top layer of gel coat to reveal fresh material underneath. It requires elbow grease but the results are transformative, a badly oxidized RV can look nearly new after compounding and waxing.