My son is doing a 6th grade music project, a guitar. We are trying to bend a piece of 3"X 24"X 1/8" lanear plywood. It is soaking in the tub, our first attempt cracked. We have now left our second attempt in the tub for two days, it is bent in a horseshoe shape and weighted down. We need to be able to bend it enough to nail it to a piece of 1 inch thick wood for the neck. Is there a trick to this? We are desperate for this project is due shortly. Please any suggestions !!!