We have four marble fireplaces in the new place that are covered in a huge amount of paint. One pair (including the one below) are almost black marble and the other pair are a white/light grey. I've heard that some techniques can leave the marble yellow - any suggestions on how to clean them up?
Btw the shelf isn't bowed, but the picture was taken with a very wide angle lens which has distorted the image.
Btw the shelf isn't bowed, but the picture was taken with a very wide angle lens which has distorted the image.