Dick, your roof before looked 10 times better than mine does now. I have large black spots and don't know if I should try to get the black out or not. I tested a small area with solution of kitchen soft cleanser and water and found it removed the black spots but I am afraid this may damage the roof. I am wondering if the cleaner you used will be strong enough for me.
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord