Well, there's a 2 part answer. First part is what are you going to do with your truck? Pavement princess (nothing wrong with that), or off road warrior? I'm a little of both, but I can tell you my entire front end got chewed up in Baja, and needed to be repaired and repainted. Fiberglass is easier, and cheaper to work on than carbon fiber. Carbon fiber usually doesn't chip, it breaks, so you might be replacing an entire fender. Talk to a good body shop, ask them, and go from there would be my advice.