If it were me I would stain the box first and let it dry. Then use a black paint compatible with the topcoat finish and airbrush the black around the edge and clearcoat it. You could do the same thing with a dyestain but might take multiple coats to get the color you want. If you were going to use mixwax ebony then I would spray it first and let it dry and then use your custom color in the center. The stain bleeds outward quite a bit so don't go too far with the black. You don't have to have an actual airbrush. You can choke a paint sprayer down to where it barely sprays to do this.