A masking apparatus is provided for masking a workpiece, for example a turbine blade, to protect portions thereof from the deposition of coating material thereon during selective application of a coating material to other portions of the workpiece. The masking apparatus includes an enclosure formed of a first mask half body defining a first cavity half and a second mask half body defining a second cavity half. The first mask half body and the second mask half body mate in assembly to form a workpiece cavity it which the workpiece may be enclosed.