I built a 50 cal hawkins from a kit when I was in high school.
I bought a bluing kit from a gun shop, it was a lot of work and the results were poor at best. What I would recomend is to prep the barrel and get it ready for blueing then take it to a reputable gunsmith for the bluing process.
Another option is traditional "browning" and I understand that this is a much easier process for the do-it yourselfer???
I made my flinter from the same kit that you are considering. They sure do make a fine rifle. Bluing is a little bit more tricky than browning a barrel. First you have to degreese your barrel repeatedly. I used dish soap and hot water, over and over. When I thought it was done, I cleaned it one more time. Then I used a cold bluing kit and submerged the barrel. It turned out quit well.
I have a system I use in Whitetail hunting during the rut that seems to work for me. When I make a mock scrape in the area I wish to hunt I will place a couple of 35mm
film canisters (film removed of course) in the scrape after I have cleared out all leaves and other debris. The film canisters are filled with cotton balls and saturated with doe in heat urine. This keeps the urine from soaking in the ground and can be refreshed on each trip if needed. I will also use the tarsal gland of the buck...