The machined surfaces look great Jay! The cast surfaces look good to me also. But I'm more of a cosmetically challenged, chrome don't get ya home kinda guy.
Perhaps a coarse glass bead and a clear coat of VHT?
Back when cattle guards and cross walks were painted on, I used to get the cheap glass beads that were sprinkled in the wet paint. They were coarse and seemed to be tougher than the regular metal finishing glass beads.
Maybe for a slight upcharge you could offer a silver or clear powdercoat?