I wish I’d thought to take a before picture. I first found this product YEARS ago at a brick and mortar store and then they stopped selling it. I have a tiled shower in my bathroom with a glass door and one of the hinges started dripping rusty water on the flat transition plate under the door and made an awful rust stain. Then, I found this product again and it’s gone! Problem solved in one application. I first used this on rust stains on a 50-year-old porcelain sink in a house I was remodeling – bam! Rust stains gone. It really is an amazing product!