chips in fibreglass you mean in the sense of like rock chips and dings and such? The easiest way to fix those is with bondo :P Or the other thing you could do that I've done a few times is rough up the area around it like you'd fix one on a car and fill it with resin, but you gotta make sure its really rough even the inside of the hole so the resin can hold. But this isn't the best fix, most people I know just used bondo.