Yeah, that rust kicks a$$. Very, very good.
I agree with Ed... I see where you're going with the "chalking" of the lettering, and it's a very effective thing to do. But I think, as Ed says, it's a little heavy. If you can try to mute those white streaks a bit, I think you're on your way to being Mini Me to Tim Mann.
Either way, it looks way better than my stuff.