RE: Fiberclassic skin delamination
Without seeing a picture the following response is conjecture. I think the layup you have is herex in a glass sandwich. The color layer is paint rather than an actual gel coat. It doubt that the paint delaminated, it is more likely you have a bubble from the glass not bonding properly. This could be from a dry spot, or a vacuum issue in the mold. The best bet is usually to open up the hole and clear the debonded area. Don't break through the herex core, fill the hole with epoxy and microballoons. This should stabliize the bubble area.
If you are unsure post a photo.
Mike