Oil and Grease
Greasy food stains, or oil stains from vehicles, can be surprisingly stubborn and difficult to remove - especially from porous surfaces such as wood, natural stone and concrete. It is best to act quickly to remove stains that contain natural oils as these will react with the air and harden (resinify) which makes them harder to remove. With synthetic oils, such as engine oils, cleaning is less urgent as these do not react and harden.
Where required we use a specially prepared poultice to clean grease and oil. A poultice works by pulling the oil or grease out of the substrate - almost like a super absorbent blotting paper. A cleaning poultice does not require water and can work particularly well on delicate surfaces such as historic stone, although it is also effective for cleaning other surfaces such as marble, granite, brick and concrete.