Rust-cleaning and enhancement reagents were applied to mural and colored drawings with calcified soils. After the treatment, the properties of the mixed film were tested. The optical properties of the gelatin film and enhancement reagent film were tested and their refractive indexes were recorded. The thickness and grain diameter of soil rust layer were measured. The durability and flexibility of the gelatin and the enhancement reagent films applied to simulated mural paintings were also systematically compared. The results showed that the two films have about the same refractive indexes and that when the soil rust layer is less than 120 [micro]m thick, the soil particles on the top 70 [micro]m can be recovered using the reinforcement reagent without interference with the paint layer. The reagent helps to restore mural painting’s original appearance. Performance test of the painting was artificially aged. The data show good performance of the painting after aging.