Lesa's Scamp trailer was previously owned by who knows how many people. It used to have an air conditioner on the roof. Removing it left holes in the fiberglass exterior. The holes had been patched in various ways, some of them ineffective.
So now Lesa is doing it the right way. First she scraped off the old stuff. Well, actually, some of it sort of came off on its own. A lot of good it was doing. Then she'll sand, wash and apply proper RV roof sealer. No more drips.