Care and Maintenance Instructions Nuncio Stone Composite Shower Walls, K/CD Series Shower Bases, & Cascade Tubs GENERAL CLEANING INSTRUCTIONS For normal everyday cleaning, Thelma-Glass suggests using Formula 409 or Micro ban 24 Hour. The use of scouring pads or abrasive cleaners will dull the surface. Should you wish to use a product not listed below, test ona small area in the comer of the skirt before applying to the entire wall or bathtub liner. Always review individual cleansers’ instructions.