Ok so we ended up getting 5/8 okoume plywood for the interior panels. Then we are going to use pettit sea gold synthetic varnish. It’s supposed to be a low maintenance varnish. We are struggling on what thickness to use for the floor. It looks like the current floor is 1/2 with fiberglass resin only on both sides. This is not the original floor and i am having trouble finding out what thickness the original floor was. 1/2 and 3/4 marine plywood is available locally. I just thought 3/4 is a bit heavy and 1/2 just seems weak…so 5/8 is right in the middle but special order! I definitely would like to use the lightest material without sacrificing any durability or stiffness. What do you recommend?

thanks for your time

Brian

Thank you all for the replies. I think we are going to use 3/4 bs1088 okoume plywood and epifanes matte varnish.