Glue a paper-sized piece of foil to a piece of glass, tight and flat.
Wipe with white vinegar to remove oil stains.
Sand the foil with fine wet sandpaper. Matte it and wipe it clean.
Now draw on it with a lithograph crayon.
Here's the fun part: place the mounted foil over the sink and pour Coca-Cola over it, covering every bit of the surface. Acid will etch metal. Rinse with clean water and dry.
Wipe dry surfaces with vegetable oil. It will melt the crayon marks, leaving a clean plate ready to print.
