rust stains on blue stone

cliffjamJuly 27, 2009

Any suggestions on how to clean rust stains from blue stone patio?

Thank you!

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What are the stains from? If it is just a light rust circle from the bottom of a can, you may be able to just take a brush and water and scrub it off.

    Bookmark   July 28, 2009 at 9:28AM
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Rust remover! Barkeepers Friend will work.
Make a paste and put it on, let it sit and hose off.....repeat if necessary.
Linda C

    Bookmark   July 28, 2009 at 11:35PM
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Try the Bartender's Friend first, but if that doesn't work here is a more dangerous solution. While wearing rubber gloves and eye protection, pour a small amount of 'The Works' toilet bowl cleaner - which is actually hydrochloric acid (Mercuric Acid) - on the stain and it will disappear immediately. Be VERY careful with this and make sure that it doesn't get on anything else but the stone. Rinse very well - better to CAREFULLY pour water on the acid to delute it than to use a hose that can splatter.

Note: 'The Works' has different product lines for cleaning tub & tile, for example. What I'm talking about here is the 'for toilet bowl only' product.

    Bookmark   July 30, 2009 at 10:44AM
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Hydrochloric acid is also called muriatic acid.
I wouldn't be using it on my bluestone patio. Sure it will remove the rust stains, but depending on what kind of blue stone you have it may etch the stone.
If you have any stone left over, try it there first.
Linda C

    Bookmark   July 30, 2009 at 5:54PM
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I've used lemon juice and salt and sit in sun (or not) on clothing to remove rust stains. (old dryer, damp clothes in dryer overnight left rust stains because drum was bad, got new dryer) It took a few treatments but mostly worked.

    Bookmark   August 1, 2009 at 8:13AM
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In any case, rust stains can be removed using HMK R77 Rust Remover. This is a dilute acid cleaner that is not suitable on polished stone, and you should test it first on an inconspicuous area first.
This is a special order item available by calling Diane at 406-880-7866
Once stone is clean, it should be sealed using HMK S34 silicone impregnating sealer.

    Bookmark   August 3, 2009 at 7:17AM
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