So, is it ok to paint an alum roof on a Class A, (Winn, Chieftain, 1989) to help seal up any pin holes that might have developed? If so, is there a special type of Alum Paint to use on an RV roof or can you just buy the silver alum paint from like a paint store or Lowe's or ??? What is the process for applying it? Anything special to do or look for?