In the process of replacing my transom and fixing some small damage to the outside of the transom I san ded through the gelcote in a couple places. DO I need to re-gelcote the entimre transom area? Can I leave it? Can I paint it? What type of paint? Does itneed to be antifouling, and if so, can I get it in white? It'll only bein fresh water, maybe 10 times a year, and on a trailer between trips.