Flagstone makes for beautiful floors, patios and walkways. This look generally comes at a relatively high price however, as the cost of the flagstone itself as well as its installation can be significant. An accident like a grease spill can thus be reason for concern for a homeowner who has invested in flagstone. Fortunately, there is a method that is effective in removing grease stains from flagstone.
Make a poultice from paper towels and acetone. Use enough paper towels to cover the affected area completely.
Place the paper towels over the stained area of the flagstone.
Pour small amounts of acetone onto the paper towels until they are saturated.
Cover the paper towels with plastic wrap and tape down the edges of the plastic with masking tape.
Allow the poultice to work on the grease stain for 24 hours, then remove the plastic and paper towels. Allow the area to dry, then clean it with a mild solution of dish soap and water. Repeat the entire process as needed; stubborn stains may require more than one application.