personally I love the beat up war weary look.....thats the only way I would do a skin....I really dont like the look at a nice right off the assembly line look to a skin.
but your paint looks too evenly splotched all across the board....and there is not enough paint chipping off...(I see none)
I am guessing you are using a plasma cloud....
I would do a few different layers of "dirt" with plasma clouds....using different modes with minimal opacity...
I would not use a motion blur(just MO)....I add a transparent layer then I would select the areas I want the dirt... and add plasma clouds....desaturate the color and drop opacity...you can duplicate that layer and reverse colors....again changing the opacity/mode.... or just create a few different layers to build upon the dirt layer....(selecting a color and deleting that from the plasma clouds and then adding a drop shadow...or emboss....very soft opacity....experiment for that right look...for sun fading and paint wearing..and then chipping...each will show a different effect...
not sure how you do the paint chipping....but I will create a BMF for the whole plane just like it would look without paint...allowing for different sheets of metal...and then having that layer below the paint layer...then just erasing the paint layers along the panel lines...canopy seams..wing roots....ECT ECT
exposing the bare metal layer below.
not sure if you have seen any of my skins....this is a P40E skin I have ingame...I used a couple different layers to build the dirt layer...you can see how it is not "even" across the surface....giving a more realistic look....

I am not trying to say I know better or insult ya in any way....I hope you don't take it that way....
