The process involves spraying and polishing the cylindrical space inside the engine in which the piston moves. During the spraying phase, sparks fly as charged metal wire is blown using gas to atomize the material and coat the inside of the cylinders. The thickness of the coating only needs to be about 200 microns (0.2 millimeters) – or about twice the thickness of a human hair (100 microns) or three times thicker than a grain of salt (60 microns).
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