Thanks for raising the issue. I am a novice and really appreciate the experience you provide.
Back to my build, I mentioned in another post that I sent my polished suspension parts to get anodized. After some discussion I elected to try clear anodizing. The company I used told me that the anodizing would not keep the polished surface, and that they would reduce the time used to anodize to try to keep as much polished luster as possible. They suggested not anodizing the rear upper control arm due to the fact that it has a ball joint embedded in it and they were not sure they could block it out completely.
The anodizing certainly creates a quality surface, but it is a satin silver surface. If I had to do it again, I would either leave the polished surface alone and use WD40 on it periodically, as Fran suggested or I would anodize the parts in Black.
As you can see from the photos, the satin silver is different from the polished surface the rear upper control arm has remaining. They both have a quality look, so I am fine with it.