Aerospace components, specifically gas turbine superalloys, require advanced machining techniques to fabricate complex shapes and to generate flow patterns for part cooling during operation.  To meet these needs, water jet machining has evolved into a highly controlled process utilizing multiaxis machining technology to generate shapes in any materials.  This process is impervious to inhomogeneities of structure or imperfections in the base material.  In the aftermarket arena, the process removes coatings and oxidized material formed when the environmental coatings are subjected to high operational temperatures.  The coatings are removed uniformly with no damage to the substrate.   The process is ecologically superior to conventional coating removal processes since no toxic waste is produced by the waterjet process.  Surface finishes are pristine and there are no imperfections such as recast layer, intergranular attack, or alloy depletion common in many nontraditional machining processes.