I Rhino-lined the whole inside of a 20foot cuddy cabin cruiser about 20 years ago. It worked and looked great in black and grey two tone. I pulled the inboard out and had a custom aluminum pod built for a 200hp Yamaha out back. The whole in the floor where the inboard was located was filled in with an auxiliary 40 gallon aluminum fuel tank and then covered with marine grade plywood. The whole bottom and complete inside of the boat was Rhino-lined. While no longer owed by me it’s still in great shape and holding up well. The only down side is it got a bit slippery when covered with fish slim and blood, even with a rough finish. If you’re a crappy fisherman that shouldn’t be an issue.