Any chance the epoxy was noticibly thickening by the time you got to the last butt joint? If the epoxy was starting to kick-off, it may not have wet-out the glass or soaked into the wood too well. You could sand off the glass and back down to wood and reglass the seam. If it's an inside seam, you won't see it. If it's an outside seam you may see some color variation when applying epoxy to an already epoxied surface. However, if it was a problem with too thick epoxy, it probably didn't penetrate too far anyway.

> I finished epoxying the final butt joint of my Osprey Std earlier this
> week. The first three sides came out well, but when I removed the mylar on
> this last one the epoxy seemed to stick to the mylar and after another
> couple days I took a closer look and the glass is flaking off above the
> fiberglass tape and around the edges of the wood strips the tape doesn't
> seem to be sticking to the wood very well.

> What do I do? I'm worried that if I just sand off the flaking the tape is
> going to lift up off the wood (it's a very small area, 1/8" max, on
> the edge of the wood strip that's lifted) eventually. Any suggestions on
> how I should proceed and what causes this (so I can try to avoid it in the
> future) would be greatly appreciated.

> Thanks in advance,

> Brion