A few rather large bubbles sprang up under the fiberglass, right down the center of the blade. I'm not sure why--it could be I just didn't catch them when I squeegeed, could be that they were beading up in response to some sort of contamination. Regardless, there they were. So I went out to the shop this morning and took the tops off them with a razor blade. I'll sand them lightly with some 220 grit sandpaper and put the second layer of epoxy over them. Maybe they won't be too visible.
Update: I tried to get a good picture of the bubbles, repaired before the second coat, but my camera doesn't do close-ups well. In any case, after I put the second coat on, the trimmed and sanded bubbles were invisible.
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