Steps 2 and 3
Step 2: Cutting and Priming the Tombstone
Cut out the enlarged template. Trace the design onto a 2-inch-thick sheet of polystyrene insulation (available at home stores). With a fine or medium jigsaw blade, cut out the tombstone. Carefully sand the edges with medium-grit sandpaper (heavier sandpaper may tear the polystyrene). Paint the tombstone with a coat of light-gray or other neutral water-based primer; let dry.
Step 3: Painting the Tombstone
Apply a first coat of medium-gray water-based paint, and let sit until almost dry.