repair dealer and you can get a fiberglass repair kit that will include the two part epoxy, fiber cloth and all to repair it.
The problem will be in painting it the same color as the other parts.
You might even try an auto dealer, like Chevy, the Corvet is fiberglass and the might have a repair kit for that.
This is to fix the crack.
You might even fix it with silicon 100% caulking. This will be much easier, but might have to re apply frequently.
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