With little more than chalkboard paint and a sheet of galvanized metal, you can create a multipurpose magnetic chalkboard. Use chalk to write your shopping list, and keep coupons handy using magnetic clips.
Using a utility knife, score a sheet of galvanized metal, and cut it to size.
To create a patina on the metal, first rub coarse steel wool across the surface. Then, using a paintbrush, apply an aging solution, such as Modern Masters; let dry. Use the steel wool again to lighten areas that are too dark.
Using 2-inch masking tape, mask off a 2-inch border. Prime the metal with a latex primer made specifically for galvanized surfaces (ordinary primer will flake off). After the primer dries, lightly sand the surface.
Apply one coat of latex chalkboard paint, and let dry. Sand the painted surface, and repeat with a second coat. Carefully remove tape.
Using a hand held drill, drill a hole in each corner of the board. Secure it to the wall using screws or other hanging hardware.
To magnetize your eraser and chalk holder, cut pieces of adhesive magnetic sheeting to size, peel off the backing, and stick the pieces to the backs of the eraser and holder.