Stainless steel repair and cleaning and other materials exposed to the atmosphere, stainless steel will be dirty. Seminar will analyze the future effects of design factors of repair and clean-up costs of. However, in the rain erosion, artificial irrigation and has dirty between the surface there is also a relationship. By the same slab placed directly in the atmosphere and stored in a shed where the effect of rainfall determined. The effect of artificial flushing manually with a sponge with soap water every six months to clean each strip of the right to determine the. Results show that, compared with the stored in a shed where and where not washing lath, through rain and manual scrub to remove surface dirt and deposition on the surface of a good role. But also discover, the surface processing conditions also affect the lath, better effect than the smooth surface of the slab surface roughness. So wash the interval is affected by many factors, the main influence factor is the required standards of beauty. Although many stainless steel curtain wall is only clean glass to wash, but, in general, for external stainless steel washing two times a year