Here's his description:
http://www.kayakforum.com/cgi-bin/Building/index.cgi/noframes/read/180349

: Bill Hamm,

: I am seeking your advice for my next boat build. Even tho my whitewater creek
: boat is still in the works, I am already planning out my next boat build.
: I will be building a Yost-style (plywood stations) build of a
: to-be-determined design (probably one I've had on hold for a little bit).
: But I am very very curious about your skinning technique, and am thinking
: of giving it a shot.

: From different posts, I've gathered that you cover your frame with
: heat-shrinkable Dacron, iron that to drum tight, and then cover that with
: 4oz glass and epoxy just as any other boat..? I've done some searching on
: here to see if you had a more detailed description, and I have come up
: short (read: you post a lot, and I got tired of searching through the
: mountains of posts) So, hopefully my laziness is forgiven if you did
: have a long post back there~

: I have two questions about this covering method: 1. Do you fill the weave of
: the Dacron with epoxy before applying the glass (with a roller perhaps)??
: and 2. Do you apply a varnish after the Epoxy has cured, or do you use
: something crazier like Coelan to fill the weave of the glass while also
: acting as a UV inhibitor...?

: From what you've said, its a strong covering for Skin boats, and the build
: process of it seems more appealing to me. It also seems like a good Skin
: for use all year round, and that I wouldn't have to worry as much about
: sagging and/or wrinkles. As always, any advice is greatly appreciated~