Cheap, good quality Shuriken throwing star

Step 2: Prepping the plate

In order to draw on the plate with pencil, it needs a rougher texture than the glass smooth-ness that it comes with. You only need to prep one side.
Start with 60 grit silicon carbide sandpaper if the metal has lots of bumps. If not just use 240 and sand in small circles until the whole thing is done. You should be able to make a mark with your pencil.