OK, so I have determined that the white part in the photos is foam, and that there is fiberglass on the inside and outside of the hull with foam in between.
Planning to put fiberglass backing on the inside as described in the blind hole repair.
After that, what would be the easiest way to fill in the gap where the foam was without buying a ton of chemicals.... can I just use cut up fiberglass / small strips to fill the space between inner and outer fiberglass shell? I guess this would make the area pretty stiff, but not sure if that will cause any problems.
Anyone done this before?
Any help is appreciated