How can I get a coffee stain out of stone slate?

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I spilled coffee a will ago on my back steps, and now even after a rain the stain is still there.
Any idea on how I can get it out?

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  1. elvmita says:

    Pour some bleach on the stain and let it soak for an hour. good luck.

  2. Questioner says:

    No i have a stain in my cement walkway that’s been there for years and gone through dozens of rains. the stone is too porous to be “cleaned”.

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