Before we start this project let me warn you that it is a messy business. You should have some rubber gloves, a couple of tubes of clear silicone caulking compound, (don’t get the odorless kind) some Xylene, (this is for cleanup so get a pint or so) a can of paste wax, a small bottle of glycerin, and some acrylic crafters paint.
You should be able to get glycerin at a pharmacy; you only need a little so get the smallest bottle you can.