When cleaning the rubber roof of an RV, is all you have to do is use a cleaning solution, let it dry, patch up any damage, and then use a protector? I don't know when, if ever, the roof was cleaned on my RV so I want to do that while the hot Florida sun is cooled down. Also, is there an easy way to put air in the rear duel tires. I have entenders on the inside tires, but the tire valve on the street side rear tires are difficult to get to. Thank you all for your help.