If you have gone through the glass, then fill the spot with a patch of more glass and resin. Lightly sand the areas around this spot to feather edge the existing glass covering for a distance of 3or 4 inches on all side of each spot. Paint on a bit of resin, slap on a patch of glass cloth that is an incho or tow bigger than the sanded area, and cover immediately with another thin coat of resin. The wood under neath is probably still sealed so you won't need much resin for a patch. Adter the resin cures, lightly sand the edges of the patch to "feather them into the rest of the boat. Apply another coat of resin.

This is basically the same method for patching any and all bad spots, whether from delamination, inpact damage, tears, or what have you. If you doit right, the center of the patch is a single thickness of fabric thick -- same as the rest of the hull around it, and the taper of the patch should match the taper on the galss on the hull, so the patch is not thicker than the rest of the area.

If you are unsure of whether you have sanded through a layer of glass cloth the chaces are good that you did not. leave them alone. If you have any problems with these spots in the future, just patch them as needed.

At this point your hull should be ready for a thrid overall coat of resin and then varnish or paint.

From here on in, keep your sanding lighter.

PGJ