How do you remove iron stains from brick?
How do you remove iron stains from brick? 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.