I am building my first kayak (a Great Auk modified to 15 ft.) and last night I finished glassing the hull. I noticed there were minor creases in the cloth when placing it on the hull, but I figured they would flatten out and disappear after wetting out. I was wrong. Now I have lines across the bottom of the kayak, some of them have air trapped beneath. And the aluminum fiberglass roller didn't help. What is the best way to fix this and how do I prevent creases in the future?

Any help would be much appreciated.