I have marble in my bathroom and granite in the kitchen. I had etching from various substances, including toothpaste and vinegar in the bathroom. In the kitchen near the sink the granite had lost its shine due to so much water pooling under the faucet handle. I bought this product hoping that it would bring the shine back to both surfaces. The instructions are simple, and after one use on the marble it brought back the shine on several spots that were etched and dull. However, on the area where vinegar had been after the first application I saw improvement, but it wasn't very shiny. I used the product a 2nd time and the surface is almost back to looking brand new! I am delighted! I then tried it on the dark granite in the kitchen. After one application I see a big improvement, and the surface is better. I will apply it again and I'm sure it will regain the shine it once had. The only other caveat is that I find you do have to rub the surface pretty hard at the end of the process to get the shine to come back. I would definitely buy this if you are having trouble fixing etching on your marble or granite countertops. I gave it 4 stars due to the amount of vigorous rubbing involved to renew the shine.

Due to my own carelessness I etched my marble bathroom vanity with vinegar and liquid soap droplets. This product works as advertised! It didn't take that much time or as much elbow grease as others described. It took only a pinch for what I needed it for so I have more than enough for future stains. I HIGHLY recommend this product. Reasonably priced. And it WORKS!!!

Had a light peach like limestone bathroom counter that in the act of removing calcium deposits (lime away/clr is a big NO NO) that I etched and left a large white film all around the faucets/spouts area that looked like calcium but was not. I purchased various diamond dust composite wheels assuming I would need the extra help. After like 5 applications I got it back to like 99% without needing to use a drill/polisher. I am not a perfectionist and did not want to risk making more work by using the polishing wheels. This like does the opposite of CLR lime away to limestone. Used sparingly, a little goes a long way. Also make sure to keep spraying with a water bottle during cleanup till your rag shows no black residue. That can take 5-10 times to get all remaining residue gone. I assume that can mess with when you re-seal after.

It also did a very good job with much less effort removing other surface stains other places around the sink from sitting water and other things from multiple year use of the counter.

Less than two weeks after having a bathroom remodled, I had done a little cleaning with a mix of water and vinegar. Not knowing that vinegar immediately etches marble I had set the wet bowl down on the counter multiple times, and then wiped it up with the damp rag I'd been using. A couple days later I realized there were three water marks and a swipe from the rag. I tried to wipe it up, but it didn't work and after a quick google search I realized I was in big trouble! I spent the morning googling for any and all possible fixes and came across this product with the best reviews. I purchased this product, followed the directions exactly, and could not be more pleased with the result!
Someone else referred to it as magical and they are absolutely correct. I only wish I had taken before and after pictures to share.

I used it one time and it took out most of the water marks the counter had. Used lots of elbow grease! Might have to use one more time again but over all it worked.