Iron rust layers. which are greasy. clean mechanically with petrol or white spirit. Cover the surface with a rust converter. the effect of which is proven by the development of a grayish brown shade. To increase the effect, the surface must be moistened with water after 2-3 hours. If the temperature during processing is above +25°C. water is absolutely necessary. The surface can be painted after 24 hours. It is advisable to prime the surface before painting. The rust converter must not be used below 0°C. the loss is 100-170 g/m2.