The Cozy Girrrls site shows how to use the click bonds to attach something to the surface of the fiberglass.
I used click bonds on my plane's aileron hinges by inserting them through the top skin of the wing.
Here's how I did it: I drilled the holes per plans, and got everything lined up correctly. Then I inserted the click bonds through the holes from the outside and traced around the heads on the top skin with a Sharpie. I removed the click bonds and used a router attachment on my Dremel to route out the area inside the circles so that the click bonds would sit flush with the top skin. I added 2 bid to the inside of the wing to provide more strength to make up for what I removed on the outside. I floxed the click bonds into place and put 1 bid over them from the outside, and peel plied. I put hardware store nuts on the inside to pull the click bonds nice and tight, squeezing out any excess flox, and squeegeed.
I think they turned out great! I attached the other half of the hinges to my aileron this past weekend, and last night we attached it to the wing and I'm REALLY pleased with the result. I took a few pictures and will post them if I remember.
You can see a similar process on Wayne Hick's site, even though he later changed his mind due to aesthetics. I don't think he routed the top skin as I did.