RUSTCON is a multi-function, stain converting, stain removing agent, by which also surface coatings providing corrosion protection in a single phase can be created. The agent in the paint removes stains from iron surfaces by a chemical process so that the iron compound created is integrated into the coat of paint generated. By way of the additives in RUSTCON, the coat of paint protects iron objects from further corrosion and also provides a decorative coating. By the preparation stains can be removed, stabilisation and the creation of a corrosion protection coating can be achieved in a single step. The surface created is water-repellent, and is black after thermoplastic drying (softens above 80°C). The temperature resistance of the applied and already dried Rustcon paint coat is guaranteed up to 70-80°C.