Another option for a counter top is a solid core door. These slabs are available at lumber yards in paint-grade with a hard surface (masonite) and are flat and heavy (1 3/8" or 1 3/4" thick). They are available from 2' x 6' 8" up to 3' x 6' 8" as standard sizes. Get one without the hinge mortise or lockset hole and you have a pretty good work area. Best to use a sealer on all sides and edges to protect from moisture (don't use latex paint, too clammy when it dries). Another option is the particle board with a fused surface called "melamine" to have a slick surface which is water resistant. It is available in different colors, but is best with an edge applied to the working side. tim