sanding and polishing floors usually involves three stages: Preparation, sanding, and coating with a protective sealant. polishing floor The sanded floor is vacuumed and then coated with solvent-based polyurethane or other sealants, such as water-based products or oil. Three coats are applied of each coating material. Benefits of Sanding and Polishing Professionally sanded floors can add thousands of dollars to the value of your house and can enhance the look of a modern or older style home