The finish looks like a dipped galvanized finish, but even if a zinc electro plate I am unsure they would have really shined.
I made the mirror side rails for my nags after seeing illawara92's cool egg head custom set in an earlier post. (still have two Nags sets for sale.)
Nags_Side_rails_(resized).JPG
Nags_side_rails_2_(resized).JPG