Some people prefer steel parts, thinking that fiberglass parts can't possibly be as strong as their steel equivalents. So for those people here are a few strength test photos...
A spare tire on the hood. No big deal, you could probably set a spare on a factory TJ hood without damaging the hood. Not sure about a CJ hood, they don't have a center reinforcement like the TJ hoods do.
In this next photo I'm lifting the hood by the front corner to test torsional strength. Notice how straight and level the hood is, basically no twisting. A factory hood isn't rigid enough to do this.
But that's not so much weight yet, how about the 6'6" 225-lb. gorilla test?
The gorilla test on the fender:
I would have stood on the hood as well but the ceiling in my workshop isn't tall enough
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BTW all of these parts are lighter in weight than their factory sheet metal equivalents.
I don't recommend you try these tests on your factory sheet metal parts. I wouldn't try this on any of the commercial fiberglass parts on the market either, I've built my parts to handle these weights and stresses.
Back to the first two photos, spares on the hood seems to be a common thing to do in the Land Rover world, but I've never heard of anyone wanting to carry a spare on the hood of their Jeep. But with this hood, you could.