The pale color gives it a nice worn effect. Maybe a bit overdone.
I'd make the cross a bit more black. Or if you want to make it look worn have the camouflage shine through just a little bit. Maybe at some places a bit more then others by using a small eraser with less then 10% opacity
To add to the worn effect, try to add a bit of dust like around the wheels (dust from take off and landings.
Well it's my first skin exept the one with the shark mowth but i just added the mouth on that one but this one is all my work,btw how i can make the dust?
Well, think how dirt from wheels would land on the aircraft.
Use black to brownish colors (have to try for best effect)
Start a new layer on top of the other layers (except internal machinery). Use spattered brushes and then smudge and blur tools to smear it out. Use the layer opacity to tone it down to a subtile effect.
