At this point I think all I would do is lightly condition it and then wax it with either Carnuba Cream or Tandy's Leather Balm with Atom Wax.
Scratches and worn spots are part of old leather items,,,
They are like the wrinkles around our eyes,,,
They give us character.
At least that's what I keep telling the young ladies I flirt with.
If you have gotten the leather softened with Dr. Jacksons,,,
Now it's just a matter of a coat of Carnuba wax and some buffing,,,
Then the leather will glow a bit and show some depth to the old patina.
I almost forgot,,,
If you are going to dye the background for contrast,,,
Definitely do that before you apply any type of wax coating.