Just as a test, I tried a 3' by 3' area on the side of our this spring with a sample that was given me. I could still see that area this fall when I was getting ready to cover it for the winter. It seemed to stay cleaner and definitely repelled water, even after at least 5 washes. So I bought some. I only did the front before I put the unit away for the winter. It is really easy and quick to apply. I will do the rest of the coach in the spring. I also put it on my old Datsun, even though it never sees the rain.
Vicki and Mike, Aria 3901- The Wined Up Bus