Abstract: The present invention discloses a process for cleaning oxides, slurry, dirt, impurities, organics and volatile matter, rust and other scales from substrates. This cleaning and surface preparation action is affected by abrasion, shaving or dry machining of the substrate material as caused by dry magnetic abrasive particles, either in powder or granule form, which engage the substrate material in a magnetic field. The passage of input current through a motor generates a magnetic field, which creates a “coupling” between two surfaces, the driving (stator) surface and the driven (rotor) surface. The magnetic coupling between the surfaces is provided by stiffening of the particles, which allows the mechanical abrasion that is necessary for the cleaning action on the substrate.