G'day Shantz, The old "What I'd do" :) Buy a piece of Masonite and cut it to your size, then purchase a tine of chalkboard paint,500 ml. Lay the Masonite flat and paint on the chalkboard paint liberally with a foam brush. Let dry the required time, cut back with 320 paper and apply another coat of paint. By applying the paint in one direction only and then lightly dragging you brush diagonal you'll end up with a near perfect surface. To keep the surface nice, you must chalk it prior to use. This just involves colouring it all over with white chalk, using the side of the stick. Once this done wipe of the chalk and away you go. If you do not chalk the board before using the first couple of things drawn on it will remain visible. hope this helps a bit
regards John