geofkaye, obviously you have limited or no experience with Renegades. I have been a dealer for over 5 years, I have only seen one instance of delamination- and that was when a customer damaged an area and left an exposed edge to the weather for a long period of time.
I have had quite a few older (1997-1998), high mileage Renegade units in my shop- up to 363,000 miles, no defects in FRP- period.
Yes, no other manufacturer uses FRP, no other manufacturer can come close to the number of truck conversions built by Renegade. The market will dictate the best built most popular units.
I will say that I have heard of problems- but usually from someone selling something else and bashing the Renegade. I am at the Renegade factory service center every week, I have never seen a unit in for FRP delamination repair.
Bob