Actually, I just used a glass scraper, they sell 'em at wallmart and home depot. It's a flat blade on a handle, you just wet the surface a bit and put at an angle and scrape, easy actually, you may have to wet spots to get better action, but if you do it at a good angle, there is no scratching or anything. I changed my 110 and my 29 to dark blue and it took only a few minutes to do it, the hard part is the plastic frame if you got any on that.