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OT - Oxaclic acid vs Rust

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OT - Oxaclic acid vs Rust

Old 11-23-10, 07:42 PM
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robtown
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OT - Oxaclic acid vs Rust

I have some rust stain on my marble bathroom counter. It was caused by a shaving cream can. Oxalic acid bath works great on bike parts - would a mild solution work on the marble? Would it be too harsh? I've read about lemon juice as a treatment.
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Old 11-23-10, 08:05 PM
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If you go to a hardware store most rust stain removers are acid based, I don't see why Oxalic wouldn't work.
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Old 11-23-10, 08:13 PM
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oxalic acid is used to remove rust stains from rocks, notably quartz. It is also used to brighten up vintage beer cans,
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Old 11-23-10, 08:30 PM
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Removes rust from toilet bowls, sweat from straw hats, and black rings from oak tables, which is how I first used it.
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Old 11-23-10, 08:38 PM
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I believe acids dissolve the marble itself (marble = calcium carbonate). Test it in a polished but hidden spot (underneath?) before using it on the smooth counter top surface.
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Old 11-23-10, 08:51 PM
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Bar Keepers Friend (counter top cleaner) contains OA. I have an old (1920's) white enamel over cast iron kitchen sick that frequently gets rust rings from my inattention from rinsing out soup cans. It cleans the stains off immediately.
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Old 11-23-10, 09:00 PM
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I believe acids dissolve the marble itself (marble = calcium carbonate). Test it in a polished but hidden spot (underneath?) before using it on the smooth counter top surface.
+1 at the very least it will etch the marble, I'd talk to a marble/tile installer first.
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Old 11-23-10, 10:53 PM
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When I am removing all the rust from metal I use "White Vinegar". No matter how thick or pitted the rust is eventually the white vinegar eats the rust away so all that remains is bare metal. However, I have never tried it on rust stains but for the price it may be worth a shot - you may even have some in your kitchen cabinet.
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