When I built my first Thompson Center Renegade Kit about 27 years ago, they came in the white also. I browned mine a "plum brown." You can blue your own barrel. Birchwood Casey makes an easy to use bluing kit. So does Brownell. If you follow the directions close, it is not impossible and the results might surprise you. I guess that is part of the kit experience. If you were going to pay to have the rifle assembled and blued, you would be better off getting it pre-assembled.

You might also want to look at a Lyman Great Plains Rifle Kit. They have a true 1-60 round ball barrel twist and shoot roundball excellent. Also they are a very true authentic looking rifle.