Ghost asked me in-game for some advice on weathering this skin.
The first thing I think you need to do is age the paint a bit. There's a couple of ways you can do this, I usually use both on my skins.
The first technique uses something called a noise effect. To use this I make a copy of my base paint layer and name it "noise effect". Then I change the colour of this layer to a mid grey like 128/128/128. In Paint Shop Pro the noise effect is reached through the menus via Adjust, then Add/Remove Noise, then Add Noise. I set the dots to random and 50% then click OK. You'll have to figure out exactly how to reach this effect if you use Photoshop or Gimp or whatever. What the noise effect does is create loads of little brightly coloured random dots all over your grey layer. Now reduce the opacity of this layer until you can barely see it, say 2%-4% opacity. The paint will now have a slightly worn look to it.
The second way I do this uses the airbrush tool. Create a new layer, call it something like "dirt effect". Bring up the airbrush tool and set it up as follows. Brush size as big as it will go, brush shape square, hardness at 100%, density 5%-10% and opacity 100%. Select a dirty shade of brown and airbrush a scattering of dots over the whole of the painted areas of the skin. Change the colour to a lighter or darker shade of brown and do it again, repeat again with a 3rd shade. Now gaussian blur the whole layer, a 1 or 2 pixel blur is all that is needed. Again adjust the layer's opacity until you can just see the effect.
The exhaust stains on the side of the fuselage look like they should be a lot longer to me. They should start dark at the exhausts and gradually fade as they move back past the canopy, becoming barely visible at the tail. The also tend to spread out a bit as you move back. You should do this with the airbrush tool again. Set it to say 30 pixels wide, round brush, 50% hardness, 60% density and 5% opacity. Then build up the stain in multiple strokes, more at the front, fewer at the rear and towards the edges.
BTW your screenshots don't show enough detail to be useful, the plane is less than 1/3rd the width of the shot and the rest is scenery. When taking screenshots offline, use the "Z" key to narrow the field of view and then the left bracket key "[" to zoom in closer to your plane. Once you have taken your shots, open them in your editor and crop them so you don't have so much wasted space around the edge.
The artist who did the profile has heavily paint chipped the nose of the aircraft, but there is little or no paint chipping visible in the photo. This makes it more likely that this is a post-war plane but also illustrates why I hate using profiles as a primary source for a skin. You can also see in the photo what I mean about the exhaust stain, look how the "06" is discoloured by it more in the middle than the top and bottom.
The shade I use for Soviet dark grey (AMT 12) on my skins is RGB 56/76/70.
