Wuban stone surface formed by many sources. Some are from environmental pollution caused by improper use of some construction materials or poor construction caused by the construction method is generally the case with the common yellow stone, color, residual slag cement, quick dry rubber, adhesive, tape, Wood pigment; another kind of pollution is caused by man, such as tea stains, cola, coffee, soy sauce, as long as the variety of Wuban select the appropriate "magic II" cleaner, SCI Stone special cleaning agent can be effectively removed. To prevent contamination of stone, the most effective way is to function as a protective agent stone, especially stone installation before the protective treatment, but also can avoid the improper construction or decoration caused by the pollution, or at least before completion of the new deal for protection This avoids opening the building maintenance and construction of the inconvenience.