Mark,
That design is a knock out in my mind. A beautiful piece of folk art. I would "tone" the background down a bit, perhaps with a light application of Ferric Nitrate, but I wouldn't put much color on the engraved design. That's if it were mine, which it isn't so it is entirely up to you as the artist. Thanks for sharing the pictures and I am looking forward to seeing more pictures after your inks arrive. My best.
John