What can be done to fix interior stained concrete floors not properly sealed and now have oil stains?

Can grease stains that have penetrated into the stained concrete be removed and then sealed properly or are my floors ruined beyond repair?What can be done to fix interior stained concrete floors not properly sealed and now have oil stains?
concrete can be washed. try a pressure washer. there are special cleaners just for getting oil out of concrete tooWhat can be done to fix interior stained concrete floors not properly sealed and now have oil stains?
their is an acid i can buy at home depot . lowes places like that. i think it is called muratic acid . anyway it it sused to clean brick and concrete and stone, its simple to use just follow the direction. a scrub brush with dawn dish water detergent is good also. and hot water.

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