There is a 6 x 14 bubble in the fiberglass floor. The fiberglass is over 3/4 in plywood. The plywood is in good shape. There is a very thin layer of glass on top from the cloth. Do I just grind it out and then patch with cloth resin/hardner. Or do I just drill one or two holes in the top of the bubble and fill it with epoxy?

There are no other bubbles. There was an inch hole. I could see the plywood. There it looked good and the floor is strong or hard all over. What would you suggest?

Thank you in advance.

Dave