Putting a top coat of anything isn't going to do much. you could look at the underside and reinforce it from the bottom up. Maybe some ply and epoxy with pressure being applied from the bottom up. A top coat of epoxy with enough time will flex and start to crack. Just my two pennies.
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“Try something you could fail at. We all do things that we can comfortably achieve, but rarely do we set the high bar one notch above what we think we can clear, and that’s what’s driving me on here.” Lieutenant Colonel Alastair Edward Henry Worsley MBE (4 October 1960 – 24 January 2016) Explorer
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