Recently purchased a used 2012 Heartland North Country TT. The unit had been setting for about 4 years. Working on catching up on the maintenance that had not been done for about 5 years. Need advice on the EPDM rubbber roof. I am am attemping to access what needs to be done on it. I have observed some cracks in the caulking around A/C, vents, skylight and at the point where the roof meets the front fiberglass. They are small in nature and I will seal with DICOR caulking. In attempting to clean the roof using CW Protect All roof cleaner I discovered a lot of grey rubber roofing material coming off. I have attempted to attach a picture that shows the before and after condition of the roof with the cleaned section being to the right of the skylight and the yet to be cleaned portion to the left. The cleaned section looks like a checkerboard of black and white color. The membrane on the roof is intact with no tears or holes. Not sure if i need a roof replacment but hoping not. How can it get the roof back in good condition with a restored white coating or do I need a new roof ?