I have fiberglass parts on my car. Front bumper and side skirts. I haven't noticed anything different as far as the chipping of the paint goes on my bumper compared to the original O.E.M. bumper. I think it all has to do with how well the bumper is painted. I've had mine on since last October of 06. I have no chips on my side skirts and very little on the front bumper. I go to car shows all the time and they aren't even that noticable. I just use touch up paint where needed. I only have 3-4 that are any bigger than a pin-head size on the front. Again, I think it has to do with a quality prep and paint job for best results. I do know that the painter told me he added "flex-agent" to the paint when it was applied, and they added 2 coats of clear gel coat instead of the regular amount. Hope this helps!
