Some correlation between Machinability and Scratchability (Part - 2). Modeling of Electroplated Surfaces. Some correlation between Machinability and Scratchability (Part -1). Dynamic scratching as criterion of grindability. Computer modeling of electroplated surfaces. The powder grain size effect on the multilayer of the plasma sprayed coating process. The influence of the spray direction in the multilayer of the plasma coating technique. Theory of surface production in Electro-Chemical Grinding.