RV roof sealing project

I did exactly the same thing and my roof wasn't as bad as yours but was tan. Tan held more heat than white. How did I know? We just bought the fver and hadn't sold the TT. The TT was coated with Dicor and I was freshening it up for the sale. Climbing up the ladder on the fver tan roof was noticeably hotter than the white roof of the TT. We dry camp as such do not use AC so anyway to cut the heat down was paramount. I used the Dicor Cool Beads coating. When done inside was a full 15 degrees cooler than before. We also use HVAC insulation in the windows. Bought a roll at home t and cut to fit. Just install on sunny side and take down when the sun passes. Big difference and a good product.