Recoating rubber roof

I would not recoat it but I would invest in some Eternabond tape ( 5 to 6 inches wide min) to go over the seams and fix any areas you are concerned about. The roofs usually leak at the seams and around vents, ac etc. The tape is a permanent repair and literally lasts forever. After cleaning the area you apply the Eternabond tape and you're done and never have to worry about it again. To keep up with all the maintenance on an RV I would highly recommend that you get Automotive Wolf car maintenance software for your computer. This program will manage all your vehicle maintenance on all your vehicles. I even use it for my boat and RV generator. It also keeps a great vehicle maintenance log so you know whats been done and when.