I have a medical component that goes into a laparoscopic instrument. We have the component coated with a DLC (Diamond-Like Carbon) coating. We're having an issue with the surface finish of the part after coating. The coating we're using seems to be a little rougher than we'd like, so we're investigating polishing the steel before coating. Right now, we are using 440A and 17-4 Stainless Steel. We're looking to get the Ra value to ~.10 by incorporating a polihing/buffing process on our parts. The parts are very small (2" in length, .250" in width, and two .040" arms that extend from one end of the part to the other)(Envision a V-Shape when you think of the part geometry). Anyway, does anyone know of the proper process to polish these parts to the Ra value that we're looking to achieve? Our current Ra value is ~.65. If anyone knows of a particular vendor that I should get in contact with, I'd really appreciate any information I can get. Thanks so much!!!