Our 2008 Keystone Montana 3000RK was like most other 14-year olds...in desperate need of a new look. It's sealed up tight with self-levelling goop and Dicor tape, so I stuck with Dicor's activator-cleaner and roof product. My first coat might have been too thin because I didn't use all three gallons of paint..and at 36' by 8', I should have, according to directions. Oh well, I'll use the leftover to do the two slide roofs when I get to PEI in a few weeks. All in all, a pretty straightforward project.