Applications For metal/metal combinations with slow to medium fast movements and high loads. Both the liquid coating and aerosolized spray have been used for improving the running-in process and for lubrication of plain bearings, bushings and sleeves, power screw drives, threaded connections/fasteners, and high voltage switches ? even under high vacuum and at extreme temperatures. Additionally, MOLYKOTE D-321 R Anti-Friction Coating is used frequently for slides, guides and tracks. MOLYKOTE D-321 R Anti-Friction Coating Spray is frequently used on hard to reach surfaces or for emergency boundary lubrication as well as on chains or as a multi-purpose penetrant. How to use Surface preparation First, clean and degrease the surface that will be coated with MOLYKOTE D-321 R Anti-Friction Coating or MOLYKOTE D-321 R Anti-Friction Coating Spray. Phosphatization or sandblasting (180 grit) increases the adhesion and service life.