I think that hair idea looks pretty good too. For all my fins I use place clear packing tape on the backside and coat the front side with modge podge. Once that has dried you can peel the packing tape off the backside and then coat it. The modge podge does not stick to the tape. This works great for pedestal mounts. As long as there is enough bony structure your fine but if there is some missing the fins may curl.