This should be the train of thought for those who wheel a good amount and WILL get damage to those areas.
I have used that rubberized undercoating spray inside of fenders and it holds up well if preped correctly. Then if it does get scuffed up, just respray the area and sinse it is a textured product, it covers (touch-up) nicely. Especially if you don't want to be professionally painting your parts every time it is scuffed.