I'm attempting to cast a bio in fiberglass. I made the mother mold out of GE silicone and reinforced the mold with plaster bandages. (The Mortal Immortal and Predator Rob helped me and advised use the silicone) I picked up two packs of 9 foot fiberglass cloth and polyester resin. When applying the fiberglass cloth to the mother mold, do I need to let each layer dry or can I apply layer after layer until I have the desired thickness I am looking for? Any help would be greatly appreciated.