Originally Posted by
marosell
I ordered a kit on the internet once to etch the VIN# of my car onto the corner of each of my windows; if someone wanted to steal my car, they'd have to replace every window to remove the vin numbers :D.
I gave the company my vin number and they sent me a package with the acid-compund, and precision cut vinyl stickers with the vin# cut out. Directions were to stick the sticker on the window, apply the stuff, let sit for 20 minutes or until dry, and remove the sticker and wipe it clean. It worked flawlessly, but I'm thinking that the acid used for glass is different then the strength you would need for steel.