I second the hot glue gun.
Unless you need to span any empty spaces where you haven't got any foam, I would just go straight to the fiberglass. IMHO, fleece's only use is to stretch across between edges, it's not as strong as matte and resin. I like to use the thinnest, stretchiest, cheapest material I can find at the 'Mart. Doesn't eat up as much resin and doesn't add the bulk like fleece does.
Post some pics, it sounds cool.
When life hands you lemons, ask for tequila and salt