RE: I really Dumb Question But
I have been working with a friend of mine who is a professional in the R/C boat industry and all his moulds are made with polyester resin and boards for strength. If you are wanting to build a quality mould that is going to last a long time you should look into this. A person said on another thread that every flaw in the mould will be in every boat pulled from that mould. Do it right the first time. It will take longer but you will be happier with the finished product. Dennis