Acid Stain

[missesbell]

We have stains on a stone floor caused by battery acid. Any ideas how to remove or fade orange stains?

[Clanad]

Try a very dilluted mix of warm water with muratic acid, which we use to clean concrete. The acid is available at most DIY stores here in the U.S. I'd mix aboutt 1/4 cup of the acid to about 2 quarts warm water as a starter and even then add just a little to a corner of the stain to see how it will react… brush lightly with an ordinary broom and rinse thoroughly. You might need to make the mix a little stronger but don't let it sit too long...

[Sir Alec]

http://motherhood.modernmom.com/clean-battery-acid-concrete-floor-11194.html

This looks okay!