I think gelcoat will be easy and low maintenance the way I'm doing it. It's the same material as the resin, and just paints on after the glassing. Unless I'm missing something? I don't care about a flat smooth surface and it will be white. If there is any damage the patched area might look slightly different, but that's fine with me.I wound also suggest paint rather than gelcoat as it is so much easier to repair.