Removing stains on limestone?

Post date: 2024-08-07 03:54:15
Views: 233
I stained my limestone front steps with cork-based "coasters" for flowerpots. How to remove?

I stupidly used cork-based mats or coasters underneath flowerpots on my new-ish limestone steps. I soaked the cork beforehand to try to stop staining, but it didn't work and the coasters left brown circles on the stairs - like big coffee cup stains. The stains are about 2 weeks old. I tried powerwashing and some different household products, which removed some of the staining, but maybe like 50%. The most effective thing seemed to be Softscrub, which has bleach. I am worried about ruining the stone with too much bleach or acid or whatever. The stain is definitely in the pores of the stone - i.e., the powerwasher does not take it off.

After some research on the web, I have three methods that I and thinking about trying: (1) a homemade poultice made from baking soda and 12%-strength hydrogen peroxide, which you are supposed to leave on the stone for 24 hours (I am worried about overbleaching though); (2) a professional stone cleaning soap made by Black Dimond; or (3) leaving on the Softscrub for an hour or so before rinsing it off - the Softscrub seemed effective before, though it also seems harsh.

Any thoughts on these methods or others? Thank you!
Please click Here to read the full story.
 
Other Top and Latest Questions:
Silo: Whatever You Do, Don't Go Home Show Only
Analysis: A powerful new coalition of AI skeptics is coalescing right in Trump's blind spot
Saudi military strikes Houthi targets in Yemen after Iran-backed militia attacked Red Sea shipping
From Silicon Valley to DC, the tech world is suddenly obsessed with one concept in AI: Distillation
Like Strava, but for an old couple doing their physical therapy
BofA thinks ASML isn’t under threat from China, and that investors are overreacting
Analysis: Kevin Warsh has three reasons to hold off on a Fed rate hike this week
Shein says it's under investigation by the Federal Trade Commission as it prepares for Hong Kong IPO
Visa is cutting 7% of employees in efficiency push as AI reshapes work
The future of Wall Street is here as startups and brokers build AI agents to trade 24/7