hi, i picked up a can of marine spar varnish that i was going to use to coat and protect my wooden floor hatch, but i have been hearing alot about exopy resin. I am really confused between the two. If varnish will protect against water, then what is the need for epoxy resin? If i<br />re-apply the varnish several times, cant i build up a nice, thick protective coat that would be similar to a resin? Anyways, what would be my best bet, keeping in mind i need protection from water, sun, etc.. Thanks, Jamie