The desire for self-cleaning or easy-to-clean surfaces has been identified in recent years as an important research topic to enhance the competitiveness of companies. The approaches to obtain such a surface are diverse, depending on the specific requirements of the industrial sectors involved. Two classical approaches for dirt repelling surfaces are (i) hydrophobic or superhydrophobic surfaces and (ii) superhydrophilic, photocatalytic surfaces. A brief summary of the principles of these kind of coatings will be given in this presentation, focusing on present state-of-the-art preparation and testing methods. Examples selected from the scientific literature, a patent study on superhydrophobic coatings and commercial products will be presented to identify advantages and problems of present self-cleaning coatings.