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sprinkle carpet room deodorizer on the oil spots, the powder will absorb oil, then rub and clean with cloth.
i removed a bunch of paint soaked into a new garage floor with a whole jug of paint thinner. probably on the eniromentally hazardous side of things, though.
try MURATIC ACID from hardware store, thats what masons use.
mix 4 parts water to 1 part acid.
wash off right away, or else the cement will go from white to tan.
Use a power washer before and after if you have one
I had exactly the same problem, I used extra strenghth Era (the liquid detergent) the stain came right off.
try dawn dish soap and water and scrub with hard bristle broom and water. My husband works at junk yard and this is what they use to clean up their garage. and its enviromentaly safe too
I have read that Coke (the soft drink) is supposed to work. Pour the coke
on stain and let sit overnight. In the morning rinse with soapy water. Some may be surprised but Coca-cola can be used for alot of different remedies.
Do a "uses for Coca Cola" search and you'd be amazed.
Good luck, Jenny in WI.
Also.. Interesting tip on another board says to spray the stains with WD40 before applying kitty litter.
Another thing you can do after you try the kitty litter is get the stains wet and then sprinkle some dishwashing detergent on the stains. Rub the detergent into the stain with cleaning brush. Then rinse it with some water. Repeat as necessary.
Another Joe
I have heard from many sources that kitty litter put on the oil and grease stains will absorb most, if not all of the stains. It is also an environmentally friendly way of dealing with the problem.