I used to do weak acid etching on glass using Armour Etch and contact paper. By making a mask from the contact paper and brushing on the acid, I made a few drinking glasses and votives in high school and college. Then I made Lowell buy me a Dremel rotary tool, just before our wedding. I had read about them in my favorite magazine at the time, Bead & Button, which talked about reaming out beads or buffing metal clay pendants. I love this thing! It does so much, from actual engraving to polishing polymer clay and metal to normal handyman tasks. I engraved everything I could get my hands on after I got the Dremel. I love engraving; not many people do it this way and everyone’s always impressed with a custom engraved gift. I usually print out a design (usually clip art- I don’t draw well) and trace it onto the material with black or white transfer paper then follow those lines with my Dremel.