I would get Hydroturf. You can order the B grade seconds from their website. Use contact cement to put it down. I did the entire flooring and deck surfaces on my 16 ft. jon boat and I’m really pleased. It does not get hot during summer. Its the same stuff they put on the jet ski runners.
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I used some hydroturf for coaming pads, turned out great. I have an arched transom, once you pull the paper off, I was able to follow a pretty steep contour with no problem. I opted to get the 3m adhesive on my sheet, cheapeast, lowest profile, nicest looking, alternative to custom mabe pads IMO.