On Mon, 23 Aug 2010 08:07:25 -0700 (PDT), Frogwatch
wrote:

Can anybody suggest any guides on using corecell as the forms for
glassed over structural parts and then using sheet corecell glassed
for the hull? How do you glass both sides of something that is so
enclosed like the interior of a small boat?

Couple of thoughts. The okume suggestion is good if you want to
build a new one, very strong, light weight, and rot resistant. More
radical is to use one of the old boats as a male mold for a new hi
tech composite hull. If you cover the old hull with plastic sheeting
and mold release you should be able to pop the new hull off when
you're finished with the glass and foam work, even if you have to use
a few staples to hold things in place while you're working. Ideally
you'd like to use pre-preg glass or some sort of ultra slow cure epoxy
so that you could vacuum bag the whole thing. It will end up slightly
bigger than the original but that shouldn't be a problem unless you
are doing one design class racing.