Durability is much harder to rate, and use of plastic doesn't imply lower durability. Go look at a car with fenders that are rusting away. My car is one of the

Durability is much harder to rate, and use of plastic doesn't imply lower durability. Go look at a car with fenders that are rusting away. My car is one of them. Inside of the wheel well there is a fender liner made of plastic. That thing takes 10x the abuse of the fender and is still in good condition unless its mounting points have rusted away. I wish that they had made my fenders from plastic. My car would be in much better shape if they had.