3 lil things, Norinrad.
1.- Agree with punisher x, dust should be brown.
2.- you may like it more if you add the dust texture (a brown one, of course) in the gaps of the arms and "feet". I don't like those gaps there
3.- and its stand 3 animation looks very weird. You should fix it.
But your idea is very good. I'll give you a 3.5/5 for now.