I'm pretty sure I've seen this technique used before, but I lurv the colors in this guy.
I think that if one day I was transported into the world of Halo and I had to choose between UNSC Marine, ODST, or a Spartan, I would go with an ODST. There's just something about falling from thousands of feet in a pod and kicking major ass upon landing that just sounds awesome. So this is what I would want my ODST to look like. Green and bley. I know the gun doesn't really look Halo-y. ODST 710 will make a reappearance soon with a more appropriate weapon.
There was some dispute on Flickr as to whether or not the red matched the green... Any thoughts?
Cool technique with the shoulder plates! The red visor looks ok with the green. I personally would have used a black visor, or used a clear one with a black head under the helmet. Still looks pretty sweet though, dude! Nice work!