It would be hard to pull that off with an airbrush, you'd need to do a fair bit of detailed shadow work... i think you should decrease the amount of Blocks to like 4 on the hood. Too much is too much. If your eyes don't know where to look, its not good.
Also Blue and yellow don't go best with grey. They can work if you have a neon yellow and a neon green, a royal blue ( I think, I've never been good at explaining blues) and white. Use little green and Yellow and use mostly white, but it'll seem like there is a lot of blue. Yu might want to do away with the block though, or you'll have to do it as a pattern that is out of the way. That's what I think.