Jomax might be fine, but for the costs of our pastime, I'd just as soon spend a few bucks and buy something formulated for RV roofs for cleaning and treating. I'll be doing just that next week.
2013 Surveyor SVF 293
2013 Ford SD F250 4x4 SC; 6.2 EFI V8
Reese 18K Elite w/slider - Ada, Michigan
Days Camping; 2011-23 days; 2012-23 days; 2013-35 days; 2014- 91; 2015-65 days so far!