crabo, just so you are aware, in the past KIDD had this posted on the site about the finish on their black bolts:
"The black finish is with "Black Diamond" coating. B.D. is an extremely hard and corrosion resistant surface coating which reduces friction and wear by as much as 400%. This gives it a very durable long lasting coat as compared to other methods of making the bolt black. This incredible coating is currently being used in formula one racing engines. Black Diamond will not rub off like bluing or parkerizing and has a surface thickness of only .0002". "
I'm with CrackedCornish and Chaser. Give KIDD a call and see if they can work something out for you.