Funny enough I couldn't locate a black shark fin. I didn't bother trying to wrap the fin either. So, I used plastidip. Even though my top is gloss, it's not very noticeable that the fin isn't an exact match. I have yet to see anyone notice or comment on it. So, I say try it. If you think the color is too far off, then peel it away. Just don't tape down the fin until you're sure as it will be stuck to the vinyl.
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