Tint removal?

I know I sound like a broke record "but I work at a auto glass shop" and have been down this road before.. lol

Razor blades will not scratch the glass if you a) keep the glass wet with glass cleaner at all times where you are scraping with the razor b) always use a fresh razor blade .... check the razor blade with your eyes.... if you see it has a nick in the edge discard it. c) and make sure you keep the razor at a angle... not to steep and "catch" glass.

Any of the glue is usually dissolved by using urethane cleaner (stuff we use anyway). Just take your time and try to get the glass in a warm environment for a while before you start. The warmer the better.... trust me on this one. Good luck!