Just had a survey on a 34' Mainship Pilot. On the cabin top, pretty much center between the sides and front to back, it looks like the previous owner may have dropped an anchor or other heavy object. It dinged the gel coat and has a few spider cracks at point of impact. When tapping the top of the cabin, the surveyor determined that an area approximately 4' by 2' became delaminated due to the impact. Had a fiberglass guy give us an estimate of $500 to fix. He said all that was necessary was to drill a dozen or so small holes (I'm assuming 1/4" to 1/2" drill bit), and injecting resin. Apparently, the cabin top is cored. I'm trying to visualize what happened and how injecting the resin will fix it. Is the core material and resin so brittle below the gelcoat that a large sheet will separate from underside of the gelcoat due to the impact? Do you think injecting the resin is the proper fix? Will this affect the inside of the cabin top behind the headliner? Any insights are very much appreciated.