For over 30 years, stamped decorative concrete has provided the warmth of natural stone, brick, or a wide variety of patterns, textures and color, and combined it with the practicality of regular concrete. Acid staining is a custom process that achieves a unique, non-uniform color on the surface of the concrete. Applications for acid staining are unlimited. The appearance of old world European tile or marble can be duplicated without the extravagant price.