several items that you least expect that works really great glassing and fairing work.
Sheet Rock Seam Tape forunder your first layer of glass to give a rough area to stick well.
Kitty Hair is avail. from Boat shops or just use the same thing from you local auto parts shop cheaper known as Bondo Hair. great filler and fairing filler.
[img]
http://i8.photobucket.com/albums/a46/Skools_Out/other/Glass001.jpg[/img]