I looked at this floor and steps today. The homeowner is looking to return this stone to the original lighter color gray. He has replaced three tiles as you can see in the picture. I was not able to remove any wax with a razor blade. I believe it's some type of topical that has turned the stone yellowish.
I have about a 10 square-foot area I can do a mock up on as he will replace part of the floor with hardwood.
Any ideas on products to strip this and return it to the original light color gray?
Restoration by design stone