Rusterizer Non-Toxic Rust Remover 32oz - Remove Rust With No Scrubbing Or Wiping. Removes Rust, Calcium, & Lime Within Minutes Without Rubbing or Scrubbing. Great For Outdoor Surfaces - Effective on concrete walkways, driveways, non acrylic tubs/sinks, shower heads, bathtubs, showers, toilets, dishwashers and counters, vinyl and aluminum siding, stucco, metal, wood, plastic, stone, painted surfaces, stone, grout, chattahoochee and fabric-made items Will Not Harm Plants or Grass - Grass, Lawn and Plants will not be damaged. Although, It is recommended to remove any over spray. 100% Satisfaction Guaranteed - If you do not see the rust remove entirely using Rusterizer then you will receive a full refund, guaranteed. Our chemist work hard to make sure the product works every time. Not Recommend To Use On Ceramic Tile, Indoor Marble/Natural Stone, Porcelain, Stainless Steel or Glass