[log in to unmask] wrote:

>Im in process of following up a botched cleaning job; what I think got used was Restoration Cleaner  "ON LIMESTONE"...anyway  you get the picture ; whats the easiest best way to test for salts or residuals;
>
>
I hate to say it but sometimes RC is the product to use on limestone --
particularly to remove the black stains... but diluted and NOT in the
hands of a dumb idiot. SO I DID NOT SAY THIS! Remember when saying
"abrasive" was a naughty word? Now we say "micro-abrasive".

>Im thinking hot water at 900 psi is enough to flood the substrate what-cha-think ?
>
I'm thinking water soaking for 48 hours then 200-400 psi.

What about a large poultice?

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