I'm building a router table base on the instructions in Bill Hylton's Router Magic. To keep moisture out so that the table top stays flat, the instructions say to use plastic laminate. But since I'm unfamiliar with laminates in general, when I go to a plastics shop, what exactly do I ask for. Are there different kinds of laminates or if I simply ask for a sheet of plastic laminate and so I need to specify exactly what I want (and what ould that be). Or, do I simply ask for a sheet of plastic laminate and expect whoever I'm talking with to know just what I want?