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Getting rid of acid stains on patio
The parents have had a patio laid in Indian sandstone/limestone. Dad
decided to try getting a few mortar stains off with acid-based patio cleaner. After a week or so, the patio has turned orangey-brown where the acid has been. According to paving expert, the acid staining is permanent. :-( Anybody know if you can get rid of acid staining? Oxalic acid-based scouring powder seems to be an option, but paving expert cites oxalic acid as "unproven". Is it worth a go? Cheers, DaveyOz |
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