An easier way is to restore the appearance on the whole motorhome with a product called
Vivilon Classic
It can restore faded, chalky and oxidized filon, fiberglass gelcoat, paint, decals, aluminum or stainless steel to like new color, luster, and shine with just a simple cleaning and spraying with this clear coat restorer and protector.
After its sprayed, your surface has long lasting protection from sun fading, acid rain, salt, moisture corrosion, tree sap, bug and bird droppings and daily grime. I've been using it for over 9 years with amazing results.