I took a quick google, but I couldn't find a single service that claims to polish and or cuts temered glass. Lots of weasel p!$$ however. I would like to see a legitimate source that does such repairs because it has been my professional experiance that it's impossible to alter tempered in a controlled manner. I'm always willing to learn, the reason I learned that tempered couldn't be altered, despite the fact that City Hall told me so. And if there were a way, I have plenty of scratches in all of my glass.