blue stain i colored porcelain toilet bowl

[MasterPlumbersKeymaster]

i have a colored kohler toilet.(mexican sand )it now has a blue stain i can’t remove, from using a continuous clean toilet bowl cleaner. does anyone know of a product that will remove this stain without damaging or discoloring the porcelain.

[GuestParticipant]

Hydochloric acid will remove the brown colour from water running down the bowl, might do the blue too..

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WARNING ….. ACID BURNS !!!!!!!
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use with caution you can cause a great deal of pain to yourself

[Author]

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