I did a quick varnish over the epoxy/fiberglass sheithing inside my daysailer. I don't know if i have more than two coats, the first of which was thinned with turps. This year I had my boat sitting outside in the sun for about three / four weeks and my varnish is peeling off. I am not very surprised that my thin coating didn't last very long, I'm just surprised that it is peeling. Is this the normal way varnish fails on top of epoxy? Or is the fact that it is peeling indicating that the surface wasn't prepped correctly?