Powder cleanser bleaches tough stains and deodorizes as it cleans. Comet's abrasive powder cleanser with chlorine bleach is great for scouring tough stains on toilet bowls, wall tiles, tubs, sinks, chrome, stainless steel, stovetops and ranges, pots and pans. Its gentle abrasives can be used on fiberglass tubs and showers, imitation marble and similar, hard plastic surfaces.