Robby,
I don't remember for sure, but the color you mentioned is most likely just soot worked into the finish. The idea is to build up layers and not try to do too awful much all at once. Also I've found it's best to get as much color on the stock as early in the finish process as possible as the wood provides a place fro the color to grab hold of. When doing this type of work, I've also found it best to use almost a dry brush technique and use very little finish when building up the layers of color.
Thank again everyone. Please just ask if you think I can help. Over the years people have been extremely helpful to me and I'll gladly pass on what I can. Hope these photos have maybe sparked some ideas and interest.
Good luck,
Jim