My pursuit for perfection led me to improve our old glass polish. We now sell two different polishes. Fine Glass Polish is for mild spots that you normally see on your windshield, sunroof and side glass. Spots that are visible but hard to feel with your fingertips. For water spots that normally occur on shower doors and that you can feel with your finger tips we've introduced Glass Polish. It has more polishing compounds for heavily calcified deposits. Use either one periodically and your wipers will last longer! Both products may be used by hand with our Cotton Polishing Pads or with our Machine Polishing System and an Orange Pad. Before I recently traded in my wife's Suburban, I machine polished the entire water spotted glass area in less than a half hour! (It is much easier to remove water spots from glass than to polish out a scratch in paint.) For uncoated glass only. Enjoy our pursuit of perfection.