Thanks! I think the tan(epoxy) is pretty sound. I just want to smooth it all out a little. That stuff is going to be in the water most of the time so I'm not super concerned about the appearance. Do I have to worry about the epoxy finish or can I sand it all smooth after it hardens? (I guess I'll find this out when I look at the instruction for the stuff but first hand info is always better)

So I should use another epoxy to build up the chips and thin spots?

The boards are structurally sound. They just look rough. Would spraying on some gel coat hold up to usage for a while?