SafeRestore for copper stain on concrete?

[Neil_Asheville 114]

Looks like Eacochem's SafeRestore is an extremely versitile cleaner...worth having on hand, for sure. Has anyone used it successfully on heavy copper or oxide stains on concrete or limestone?

thanks!

/neil

[Mark Williamson 14]

Not yet, but just about everything else. It's my go to when everything else is not working.