The melamine block sponge works on stains and marks on all types of surfaces. This sponge is most effective on smooth, hard surfaces with only water required. Hand-size melamine cleaning surface on all sides. White Melamine Foam for a wide variety of General Purpose Cleaning Applications used with Water Only. NO CHEMICALS! Cleans a multitude of surfaces like Tile, Glass, Metal, Stone, Plastic, Vinyl & Fiberglass. Can remove Stains, Food Particles, Sticky Spills, Fingerprints off metal surfaces. Clean Kitchen Appliances, Counters, Phones, Computers, Tents, Awnings, Bathroom Fixtures, Glass surfaces, Mold & Mildew. For Best Results on Painted, Coated or Stainless Steel Surfaces including Finished Floor Surfaces, try the Eraser Sponge in a small test area to determine best & safe results.