Grease Stains on Exposed Aggregate

[Air_N_Water2000]

I have some oil/grease stains on my exposed aggregate driveway. I've tried many different cleaners trying to remove them. Things like Simple Green, Purple Cleaner and a NAPA brand driveway cleaner without any luck.

Does anyone have a good method of removing these stains? They are old and pretty well set in by now.

Thanks.

[bikerdad46]

You might try muriatic acid

bikerdad46