Weathering a plane helps it look good by adding "believability" to the plane, not by just making it look all dark and grimy.
The weathering, needs only to be as sufficient enough as to make the plane look more realistic - and considering that, as moot points out(rather directly), your method of 'weathering' is, to tell you the truth, a bit questionable.
For one thing, it's hard to make out any features because everything is so dark. Darkness itself has its own charm so it does look cool at a certain perspective, however, considering the quality of weathering itself, it almost feels as if the surfaces are darkened out in order to hide something.
Like once I've mentioned to JB73, try to make it look EXACTLY like the profile. And then, work your way from there.
