One Grand Glass Polish

Has anyone used this product to successfully remove mineral deposits/water spots from glass? The product details state...."One Grand's Glass Polish is like no other product. It is a finely ground rock (pumice) that eradicates water spots (mineral deposits) on glass in seconds. The process is instant and requires no effort. It's so easy, you can perform the entire job with a simple terry pad and a little arm pressure."



I would appreciate any feedback on this.
 
Try a search, I know there have been discussions regarding glass polish in the past. I think even a few on this particular product.
 
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