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How to Remove Iron and Rust Stains

Brick, Concrete, and Granite

­To remove rust stains from Brick, Concrete, or Granite surfaces:

  • Make a poultice from 7 parts lime-free glycerine, 1 part sodium citrate (available from drug stores), 6 parts lukewarm water, and enough powdered calcium carbonate (chalk) to create a thick paste.
  • Apply this paste to the stain and allow to harden.
  • Remove with a wooden scraper and repeat if necessary.
  • Wash area thoroughly with clear water and let dry.