Quote:
Originally Posted by coffeebean
I wish I could leave the bare concrete but I have one problem. The concrete near my front door, has dark brown stains that I can not remove. I have tried an arsenal of cleaners, straight, and nothing touches these stains. I don't know what the stains are but the concrete had these stains when we purchased the house. It is time to cover up that mess so I have to do something.
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Try rubbing it with a pumice stone. You can buy them at Home Depot in yhe swimming pool section.