For routine cleaning, use a nonabrasive aerosol foam or a liquid cleaner. To protect and maintain the luster of the surface, use regular applications of a liquid car wax or Gel-Gloss. For simple scratches and stains, use #400 grit wet sandpaper, followed by #1000 grit wet sandpaper; then polish with an automotive compound and a power buffer (2800rpm). Water temperature should never exceed 140 degrees Fahrenheit. It is strongly recommended that hot and cold water be mixed together, and avoid using extreme hot and /or extreme cold water alone. Do not use instant hot water dispensers. Installers Note: Use care in securing faucet and drain assembly; do not over tighten. Silicone caulk is recommended rather than plumbers putty for sealing the drain assembly.