Q. Help! I have mysterious stains on my new marble patio pavers. Our stone was set in sand over concrete less than two weeks ago. We noticed red-brown stains after it rained. I’m frustrated because I can remove the discoloration when I clean... Read More

Q. We have a home built in 1967 with black slate flooring on the interior and exterior porch and terrace. We have had some restoration done by a local stone mason but we are not happy with the finish. Even when last sealed it does not have the... Read More

Removal of rust on terrazzo will typically require both a powder poultice and a commercially available rust remover. Iron-Out mixed with a plain poultice powder works well. You may also want to try using the Iron-Out alone, mixing it into a paste and... Read More