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Removing black spots on Indian sandstone

  • 16-08-2015 11:04AM
    #1
    BoardsMember
    Registered Users, Registered Users 2 Posts: 4,784 ✭✭✭


    Title says it all. I have read that household bleach can be used, but it didn't seem to budge mine. I haven't cleaned my patio much since it went down 7 years ago. Power hosed it yesterday to find obstinate black spots remain. If I hold the washer on the spots for long enough they usually budge, but it would take a few days to do the patio at that pace. Anyone got an ideas on how to remove these? I believe they are lichen.


Comments

  • #2
    Norfolk Enchants_
    Registered Users, Registered Users 2 Posts: 661 ✭✭✭Norfolk Enchants_


    BoardsMember wrote: »
    Title says it all. I have read that household bleach can be used, but it didn't seem to budge mine. I haven't cleaned my patio much since it went down 7 years ago. Power hosed it yesterday to find obstinate black spots remain. If I hold the washer on the spots for long enough they usually budge, but it would take a few days to do the patio at that pace. Anyone got an ideas on how to remove these? I believe they are lichen.
    Try jeyes fluid.


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