[Jim27]

I have seen CNC polishing a few places. Seems like that might be a good way to do it although for my case the direction would be perpendicular to the metal flow direction. Maybe do that and then do the final polish by hand in the flow direction? Have seen foam bobs that would require polishing compound and diamond embedded bobs with some sort soft backing. Getting grit on the machine is probably a concern. Here's a link to someone that does it on softer material. Any thoughts?

https://www.youtube.com/watch?v=Bsdd9rG7nH4

[mactec54]

I have seen CNC polishing a few places. Seems like that might be a good way to do it although for my case the direction would be perpendicular to the metal flow direction. Maybe do that and then do the final polish by hand in the flow direction? Have seen foam bobs that would require polishing compound and diamond embedded bobs with some sort soft backing. Getting grit on the machine is probably a concern. Here's a link to someone that does it on softer material. Any thoughts?

If you have a High-Speed Spindle, you can burnish the surface with a ruby or carbide ball no cutting compounds needed this is the best way for in machine polishing, you take micron passes until polished this also makes a harder surface on your part