Why metal? You have to deal with door dings, welding the kit, possibly rusting.
If you had a fiberglass front fender or a non-oem metal fender, and neither one fit spot on; the fiberglass is way easier to work with. I can promise you a metal kit from a bad mold would make you take note of where the dumpster was located.
I just can't understand why people are so turned off from fiberglass. The shit is so easy to work with.