I have white flaking from my 10 year old roof. Probably about 10% of the black is showing through. More came off from foot traffic while I was working on the AC recently. So, this summer, I probably need to take care of the problem. With only a few years of RV experience, I tend to cling to the standard Dicor products. However, after reading the rave reviews on here, considering using the Liquid Rubber. The Dicor recommends a serious cleaning and pressure washing. What surface prep did you Liquid Rubber folks do? I will likely clean up the dicor lap sealant and eternabond the seams prior to applying the roof. I'd love to avoid pressure washing the roof.