Bench dept. is the one that, on aviation parts removes machine cutter marks and preps the parts for coating, on parts for the semiconductor industry removes cutter marks or polishes the parts depending on application. They usually handle any of the cosmetic issues after machining.
On bead blasting parts, dropping pressure on the blasting cabinet to approx. 30psi may give you the desired effect after treating. It makes a substantial difference in anodizing. It has the same texture visually but brightens colorwise.
On electro-polishing, on the finishes your working with is probably what your looking for. That step was always out sourced for the parts that needed it. ie. medical parts and tooling. Therefore I cannot be of help on that.
You have come to a hobby forum looking for industrial answers. There are some here that have the experience to help on some of you inquiries, but you need understand the difference in context of application. Have a nice day. SS
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