The present invention relates to a method for producing dirt-repellent coatings on metal surfaces, more particularly on wheel rims, wherein an optionally precoated metal surface has applied to it a coating material composition (K) which comprises a) at least one polyhydroxyl group-containing component (A), b) at least one component (B) having on average at least one isocyanate group and having on average at least one hydrolyzable silane group of the formula (I) —X—Si—R3sG3-s  (I) where G=identical or different hydrolyzable groups, X=organic radical, R3=alkyl, cycloalkyl, aryl, or aralkyl, it being possible for the carbon chain to be interrupted by nonadjacent oxygen, sulfur, or NRa groups, with Ra=alkyl, cycloalkyl, aryl, or aralkyl, s=0 to 2, c) at least one phosphorus- and nitrogen-containing catalyst (D) for the crosslinking of silane groups, and d) at least one catalyst (Z) for the reaction of the hydroxyl groups with the isocyanate groups, which comprises the catalyst (Z) being selected from the group of zinc and bismuth carboxylates, of aluminum, zirconium, titanium and/or boron chelates, of inorganic, tin-containing catalysts, and of mixtures thereof. The present invention further provides the coatings obtainable by this method and also the use thereof.