Water spots caused by mineral deposits accumulated on glass can be hazardous by hindering the driver's view. OSREN Glass Polishing Disc when paired with OSREN 04A Glass Polish Abrasive will effectively remove mineral deposits to restore optical clarity and provide safe, unobstructed view to the driver. Glass will also be deep cleaned to ensure optimum bonding of water repellent coatings. Suitable for use by rotary polisher(with interface) or dual action polisher(without interface).