While cleaning battery acid from an automobile battery with water and baking soda, the acid dropped to my new concrete driveway and put a brownish stain on it. (There was an excessive amount of solidified acid on top of the battery). I did this last fall and the stain is still there. Is there some way to get rid of this stain and how? Will Muriatic Acid etch off this stain?? I need HELP.
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