Cracker,
GT doesn't have their complete product line on their website. Call their toll free number on Monday - 800-441-4527 (Durango, CO) and you should be able to get the info you want.
There are lots of chemical etch kits around but they don't do the job of an air-powered abrasive.
Same old story - you get what you pay for.
Mike Burstein
Dominion Windshield Repair Inc
www.ChipDr.com
</p>