This is more of a woodworking question but it pertains to the plywood rear floor in my 49 sub. I am trying to spray some epoxy varnish on the top side of the floor and I am getting what looks like very small fisheyes in the varnish. This didn't happen on the first coat. I had it thinned down a lot so it would sink in which it did. Now the second coat has these little bitty craters in it. I am starting to sand the second coat so it can be leveled out but before I respray it I need some help. Any suggestions out there?

Weeds