Below is a picture of what "Crazing" actually looks like on fiberglass. It's more than skin deep. That's why when folks spend a ton of money to have a coach painted that has this crazing on it, it comes right back after some time. But, to have this same exact effect on a rubber roof, never seen it. I too had the "white" coating on our previous roof sluff off but, I've never heard that condition referred to as crazing. It's simply a "Peeling" of the coating on the black rubber. Ours was at a point that over 80% of the roof was black.
The roof was conveying way too much heat when that condition existed. So, that's when I decided to re-coat it. Way better temps inside the coach after that.
Scott
