Fiber Glass Hoods and Repair.

Fortunately fiberglass is quite easy to work with, provided the damaged area isn't too extensive. One of the biggest things to look out for is delamination - where the fiberglass layers begin to let go from eachother. You can do a tap test with a coin or small brass hammer if you suspect there's delam going on. It'll sound hollow rather than solid. GeorgeH also makes a great point about stop-drilling cracks. Fiberglass can be very forgiving because, unlike wood, after cutting you can build it back up if you made a mistake. Small crevices and uneven surfaces can be easily filled or smoothed by adding slurry (mixture of resin and microballoons or chopped fiber), then sanding flush. When repairing larger areas, I recommend using mat because it'll be able to spread out stress over a greater surface area. Do what TrailBeast says and examine it in person before pulling the trigger.