In my work I get to see and have alot of wood graining (on metal) done by some of the best in the country.
Very common in the late Victorian house interior trim, then in the 1920's up until the '60's in auto trim, and metal furnature work. Originally done by hand, then in the 30's the etched plate/soft rubber roller method, then in the early 40's the photo emulsion method. As such the old hand grainers have died off and mostly the plate/roller method survives.
You've brought back the equal of some of the best I've seen of the old hand skill. Excellent work!
Paul.