Repaint advice for SG figure

I want SG Ultra Magnus to look different from Optimus Prime. Overload's mold seems a good way of making the character and I can get one very, very cheap (£5). Anyway, what do you think of his paint scheme before I start painting? I may or may not remold the head.
Comic shot:

What the toy will look like:

Comic shot:

What the toy will look like:
