Pogoil, they make several types, do you remember which one you used?
On the phone the RV man said he doesn't recommend coatings because all of his customers that used them have said they flaked off and didn't last; and he mentioned that having moisture under the rubber would cause them to fail. I don't know enough about rubber roofs and coatings to know if that's true or not, hence why I am here.
I know the RV isn't going to last forever, but if I could get 5-10 more years out of it without breaking the bank, that'd be great. I don't mind the cost of maintenance but $6K is kind of steep for me right now (I have an antique home money pit eating most of my resources at the moment).