Remove the most stubborn hard water stains and spots, salt water stains and spots, acid rain spots, calcium deposits, lime, scale, silicone buildup, soap scum, concrete stains and more.with this simple powder made from 100% ground Juglans Regia sea shells. I use this myself to get the hard water spots off my glass shower doors and the mineral deposits in my toilet. Can be used on windshields, windows, shower doors, tile, porcelain sinks and bathtubs, glass cookware and dishes. Website gives many uses.
