Thanks for everyone's comments. Here we are all cleaned up
Attachment 118223Attachment 118224
With all the dirt and oil lifted off the surface of the wood, I can now make out the cross cannons. I used lacquer thinner and rag. This moves the color around and fixes any "new" scratches or dings etc. Acetone works good too, especially on areas with heavy oil deposits, but it's more aggressive. Laquer thinner is more forgiving on the original oxidized color, in my experience.
I won't get the range until mid next week, but will post back targets of how it ran.