I've been strongly considering fiberglass fenders and bedsides, but I don't live in the desert, I live amongst a lot of trees. I was just curious as to how much abuse the fiberglass will take. I plan on running tube around the opening similiar to a flare and using thin plate to make an inner fender. I know that will provide a lot of protection, but if I was to bump the fenders with a rock or treelimb will they bust or crack pretty easily? Oh! I was also planning on covering them with some type of bedliner like "ibrokeit" did with his.