Removing stains on limestone?

Post date: 2024-08-07 03:54:15
Views: 186
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:
U.S. closes 2022 probe into 695,000 Tesla vehicles over unexpected braking
Meta’s push into cloud computing means Wall Street has to prepare for lower margins
Trump says 'everybody's profiting' from recent market rallies — but it’s mostly the 1%
Nvidia offers start-up customers chance to swap compute power for revenue share
Help me help these deserving people - Web Content creation edition
Adjusting clamping pressure on Schuco barrel hinge
Stargate SG-1: Proving Ground Rewatch
Movie: The Furious
Movie: Shelf Life
U.S. job creation cools in June with payrolls growth of just 57,000; unemployment rate at 4.2%