A system is provided for plasma treating a plastic component having an exterior surface and an inside surface. The system comprises at least one fixture. The fixture includes a support structure, a plurality of locating features, and a plurality of holding devices which cooperate to position a portion of the exterior surface to within a specified tolerance. The system further comprises at least one APAP nozzle configured to move relative to the exterior surface along a path, wherein the APAP nozzle directs a plasma jet onto the portion producing a functionalized polymer layer covering the portion.