Abstract: A method and a waterjet machine for removing or stripping a ceramic coating from a substrate, especially from a metallic coating onto the substrate, using a pure waterjet without any additions. The method includes providing a water source and a nozzle for ejecting a jet of pure water onto the surface of a coated substrate; providing a substrate coated at least with a ceramic coating; positioning the nozzle and the substrate to one other such that a machining angle can be determined between the waterjet and the surface of the coated substrate at the location of impingement of the water jet onto the local coating surface; ejecting a pure waterjet by the nozzle impinging the ceramic coating for removing essentially or completely the ceramic coating from the substrate or from the metallic coating.