If you want to use chrome ferrules you could try painting them. use model airplane paint. The fuel proof dope kind that is made by either aerogloss or Sig. Any good hobby shop will know what you are talking about. I plug the ends then dip them. hang to dry and over coat that with a clear finish. Scuff up the chrome a little first to get some tooth.
Did you try soaking the chrome ferrule in the blueing solution for about an hour? I've seen it work but it depend on the quality of the plating.