Tim, I've removed tint from every Land Cruiser I ever owned (can't see out the back on the trail at night), and tried several different variations. The one that worked the best for me was using those flat razor holders with the slide button, plenty of fresh razors as ForestCam suggested, and Goop! (in spray form is easier) sprayed liberally over the remaining glue. It's a PITA but can be done in a couple of hours.