[GBlist] Rust stains on/in concrete

[Sacie H Lambertson <dlambert@grasshoppernet.com>]

Can someone tell me how to take rust stains off of a yet unsealed concrete
floor please?  I thought I understood that oxalic acid would do it, but
tried some today and it didn't.  If it is supposed to work, then what is
the solution I should be using?  Is there another product that might be
better to use?  Thanks  Sacie Lambertson

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