Suggest you walk away. If it is a paint problem that is one thing and with money can be fixed. If it is a problem with what is called "sidewall checking" or "sidewall etching" that is a problem with the fiberglass siding material and cannot be permanently fixed short of replacing the material. Any kind of "fixing" or painting is temporary and the condiyion will reoccur. Many manufactures had the problem and my understanding from Newmar was that the last year of their problems were in 2008. I had it and my siding as as well as many other Newmar coaches have had the material replaced.