Cleaning Limestone & Sandstone Houses

[Bill Clough]

I'm looking for any products to clean limestone and sandstone structures. The only thing I can find is highly caustic and it needs neutralized. If that's the only way to clean it why couldn't I mix some sodium hydroxide to clean it with and neutralize it with oxalic.

 

[grasshawg]

www.klenztone.com. I'm getting into cleaning old headstones, and did a little reading. I gave them a call and they sent me a 1 pint sample. It actually came today. Gonna give it a try tomorrow.
I can't post pics on here because my camera is a 5 megapixel that makes the file too large to upload. I haven't yet figured out how to downsize the photos, so if you'll shoot me an email, I can email you the before and afters if you like.
Unless someone wants to tell me how to downsize the photos, then I'll post 'em. Hope that helps.
Randy