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04 Oct, 2020
Does exactly what it says it will do.
I used it to remove rust on stone where sprinklers had created a stain on the house. It worked instantly, as soon as it was applied. Have a hose handy and running to immediately rinse it off. Waiting minutes might have been too long, removing color from the stone. I made it up one cupful of water and three tablespoons of the product at a time and used a small paintbrush to apply it. This covered a surprisingly large area (approximately 3 feet by 3 feet) on the front of the house. It was easy to prepare and apply. It completely removed all rust with one application. I highly recommend it.