Vraciu:
Your much closer. But some how you are not viewing/understanding lighting principles.
To start with everything has some amount of light reflection. When you take the spec channel and make it black, you have removed all specular reflection from the surface, which will not look correct.
The how you have the pannel lines will tend to make the look like dirt is caught in the depression which should look pretty good. But then on the emblem you have removed all spec.
Here are a few images that show specular lighting very well.
Notice how on the SB2U the emblem is being completely washed out at the front.
Now look at the f4f notice the spec on the bottom of the wing. The emblem apears shiny but the inward front of the wing you are still seeing spec highlights but the are spread out much more.
On the F4F bottom emblem on the back side of it, you are seeing environment mapping where you see the highlights.
The dauntless from inside the cockpit shows a semi gloss secular fairly well. Notice how the light is still washing out the grey paint making it look white?
My point is you can make specular and environment less and more, sharper and less sharper. But there should always be some amount on every thing.
Notice the floor, Thats a case of very high spec/power and environment.
HiTech