Fiberglass To Fix Fitment of Body Kit

Hello everyone,I have recently started to try and learn how to fiberglass following the fiberglass 101 tutorial.I was wondering if anyone had any how-to's or more specific information for what I am trying to accomplish.

What I need to do is somehow mold/form some sort of material to my car/body kit to smooth out the lines and cover the gaps between my kit and actual car.The body kit is currently screwed on in several places and is cracking at some of the screws,it has an approximate 1 inch gap between the front hood and trunk,there are other places that need to be fixed as well.

If anyone had any helpful information on such please let me know,Thanks