Stainless Steel Piston Component Polishing In Automotive, CNC Machined, Drag Finishers, Process Technology Examples, Stainless Steel/Inconel, Super Polishing, Superpolish/Ultrapolish Before Finished Part Pistons are used in automobiles and help the transformation of heat energy into mechanical work. ObjectiveEliminate Hand PolishingPart DescriptionCNC Machined PartFabrication MethodCNC MachinedMaterial15-5 PH Stainless SteelProcess TypeSuperPolishingEquipment TypeDrag Finisher If you are unsure what equipment and media you require to achieve your desired surface finish, then send us your part, and we will evaluate it and provide you with a metrology report.