I have never used FRP on anything so I can't tell you much about it. I did some research prior to starting my project and as with any choices there are pro's and con's. I like the looks of the seamless and smooth look as opposed to alum. I chose to go with alum do to ease of installation and repair if required. FRP must be pretty good since most of the new motorhomes use it. Maybe Hawk Engineering or someone that has used it will jump in here and bring us all up to speed. Nice looking Pete! Look's like a fun project.