Thanks for the reply. I think that "water inside" is an inevitability for any hollow surfboard design. Consequently my concept includes a draining mechanism. And that is probably as far off-topic as I should take this wonderful board. Thanks again for that very educational introduction of wax for waterproofing shrinkable fabric.
--- In Airolite_Boats@yahoogroups.com, "Matthew" <matt.passarelli@...> wrote:
> Any assembly I can envision regarding a surfboard with a woven polyester fabric membrane would end up holding a lot of water inside it WHEN the poly fails. If you want to sheath in poly then look for nonwoven veil mat... really common for your application, designed to be wet out with resin and dries transparent. Its light weight, <1oz/yd^2. Use resin, not wax. Let us know if you try to shrink it, would like to hear what happens.