A light sanding should cut right through these bubblea. A slightly more vigorous sanding will not only remove the bubbles, but also some of the excess resin you have put on.

How do I know you put on a little too much resin? Simple. You told me you had bubbles!

A *really* thin seal coat would have soaked in completely, leaving no resin on the surface to trap air. When you seal the inside, try putting on less resin.

Nothing to worry about, though. The scratches caused by the sanding fill incompletely when you lay on the glass cloth and the next coat of resin. The seal coat, even if aggressively sanded -- and you shouldn't do that -- will be a barrier to any further outgassing on this side of the wood.

If you get any air bubbles from this point on it is from overworking the resin. Mix small batches and cover small areas. If it seems to be taking a long time to wet out the fabric, make the next batches smaller and warm them to make them thinner.

keep plugging. You're almost there.

PGJ