So you wont really be able to 3d engrave those shapes out with any cleanliness. it doesnt give a specific depth, or a super consistent one. What would be easier is to make your design into layers and just cut out each of those layers and glue/weld them together. It would also take a LOT less time that way.
However, what I feel is your best option, is to make a master, make a mold with it, and cast it. Youll reduce turnaround time, and youll have a much nicer finished product. Trying to machine every single one of those will just eat up waaaayyy too much time.