by Jamis MacNiven
(Woodside CA)
I set a huge fireplace (22" across) and used buff Arizona flagstone cut in hot dog sized pieces and veneer set them with a dry stone look. I used muriatic acid to wash the excess mortar and now I have a yellow effervescence on the surface. When wet it disappears. I pressure washed but it comes back. Ideas? Help.
Comments for Arizona flagstone turned yellow
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