Abstract: A process and device for treating and repairing a hard surface consisting of a polymer film, such as a floor surface, are provided. The process comprises the steps of:(i) cleaning said surface with an aqueous cleaning product comprising 0.1-20% by weight of a surfactant and 0.1-80% by weight of a solvent;(ii) applying to the cleaned floor surface a liquid repair product, the properties of which, after drying thereof, being similar to those of the polymer film; and (iii) allowing the thus-treated floor to dry for at least 5 minutes. The device is a manually operated floor treating device specially adapted for use in said process.