How would I go about fixing this. I've got some experience with regular fiberglass,but never worked on stuff this small.

That looks like it's filled with foam. If so, make up a pot of boiling water and dunk that tip into it for a minute, to swell the foam back out. After the water dries out, repair the fiberglass like you would any full-scale boat, just don't make it heavy as a brick. You can use metal window screen material to create any missing shape and fiberglass over that, if you need to. It's not a Swiss watch, just do what you gotta do.

http://www.jbweld.net/products/water.php

I had sprayed some foam in the hull to keep it from sinking.I got the idea off a web site.

Hey what a good example of the pre repair , if you had not put that foam into your hull pre collision your damage would have been a lot worse. I am considering foaming the void in my sponsons as well in prep for the someday my boat gets hit or I hit something.

What brand of foam did you use ?
I have can of Minimaly expanding foam,and another of the Triple exbanding foam, as you pointed out this is THIN glass so I don't want to blow out the seams.

Thanks D

I don't remember which foam I used,it was a minimally expanding one from Home Depot though.I sprayed it in the sponsons with the tube that comes on the can.I hope the putting it in boiling water method works.....