A protective coating system for metal components includes a superalloy metal substrate, such as a component of a gas turbine. The blood flow in an arterial line leading from the shunt at a location downstream of the venous line to the dialysis equipment is monitored by an arterial line sensor for the presence of the indicator material. The resting ledge for the micrometer frame edge is placed on the pedestal to accommodate a 2\u2033-3\u2033 micrometer, the largest of the three sizes. The channel and the grooves are configured for gas to flow therethrough to a workpiece at least partly received in the cooling portion. A low-melting-point plastic is softened, hand-molded over the corrected cast, and removed when cool. A first one of the known symbols which corresponds to the sensed handwritten symbol is displayed to the user.