Use a piece of plywood and glass over it and punch a hole through it and you will be fine. Make sure you sand the area first to get a good surface to do the wet lay-up and make sure it is real dry.
You will want to put a hair dryer on the area for a few days to help dry it out all the way, not to hot to touch, just warm enough that it feels almost hot but you can keep your hand on the area.