: The first inkling that something wasn't right was when a plywood panel was
: laminated with 3.2 oz triaxial glass and 2-inch tape, 42 hours later both
: peeled right off.

: minutes while soaking up the warm sun in the morning. Thorough mix I let
: the mix sit while I cut the 2 inch tape. Surface prep was 60 grain

: tape slowly through the epoxy to wet it out, then laid it in place, using
: brush to dab smooth, ends to push against wood. The 3.2 oz was laid on
: clean, dry virgin plywood rear bulkhead, wet out with the brush, and
: allowed to sit as I made up some coffe, then returning, used the spatula
: to draw excess epoxy off leaving a wet, shiny coating. The ply went into
: the oven prewarmed to 140, heaqt off, the ply was set in and allowed to
: sit the rest of the day, then before Rikki came home, I set it outside in
: the sun. That night it sat next to the yak to cure. The next day I ran
: around to get ready for Florida, that night I had a chance to mess with
: the ply and found the glass hadn't stuck. Checked the tape and sure
: enough, it peeled with a easy tug. Getting back, I burned a copy of the

I think that maybe you have a form of epoxy starvation excerbated by such light glass. really light glass will "float" off the top of the epoxy, and given that you did not use a saturation coat, the combination means that the epoxy is "glued" to the surface of the plywood, but not "encapsulated" by the epoxy. Quick fix is to paint one or two more layers of epoxy onto the top of the glass.
Then I would retest.

I had a simmilar issue this fall with the light tape that Pygmy uses to create their butt joints. After talkign to some glassing "experts" they recommend me to do this.

I've been told that this condition is just as strong in tension, and compressiong, but the act of peeling, where all of the force is placed on a small-unbraced area is paticurlarly suceptable.