At first, I thin the black metallic paint. And I painted the thin paint and wipe off the paint before it dries. Inking to grooves had be done at the same time!
The monoeye is changed to a metal part to make it more realistic.
Since the metal monoeye are thick, I removed the mono eye shield and glued the metal monoeye to the axis. I think it turned out cool with a simple work.
BeforeMono eye shield is removed, and metal mono eye is glued to the axis directly After