Monday''s Ask the Experts question from a cleaning professional on the International Custodial Advisors Network
(ICAN) "Ask the Experts"
page: I have a small area of stamped concrete which has a hazy grey film on it that I cannot remove. I was told that it is minerals from the ground that are seeping up onto the surface. I was told a product called Natural Solution would solve the problem, but Home Depot dropped the product.
Stamped or embossed concrete is an inexpensive and durable surface for use in patios, walkways, and around pools. Since you mention minerals seeping up from the ground, I would surmise that this is an outdoors installation such as mentioned above.
You may have to ask a local mason to examine the problem and provide a more accurate solution to the problem than we can from afar. However, we can ask a few questions ... — Lynn E. Krafft, ICAN/ATEX editor