Well, I use aluminum oxide as an abrasive and you need a sandblaster and a compressor. I use a pretty heavy resist that has a adhesive backing that sticks to the glass. You can draw your design directly on the resist or transfer the design onto the resist from a separate drawing. Then each part of the design must be cut (with an exacto knife) & sandblasted seperately in the proper order so you get the correct foreground/background.
The glass here is "flashed" (meaning the colored glass is a thin coating on clear glass), but you can sandblast on any kind of glass.
Very basically, that's it! I really like it!
You do very nice work yourself!!