I applaud this because it's very simple monochromatic pallet that reeks of 80s robo-fiction. Good NMM, I like the different shades in each panel, though could have transitioned the tones on a few. Overall very nice.
Looking closer it's almost like you pulled off NMM steel on accident. Like his right leg. From a distance it looks likes it has been highlighted up to a pure white glow, but instead it's just some white design. If you were to simply blend these colors together you'd have some convincing NMM.