The Boeing text and logo was made on clear decal with black paint applied with a toothpick.
The undercarriage was made from the scrap kit with cut legs and the doors were also made from the scrap parts from the X-35 kit. The canopy was given a Smoke tint using Tamiya Smoke transparent paint look as on the real plane. 

The features of the plane can be seen in this picture....

The intake was covered on this model with some aluminum household foil... to "conceal the secret intake shape" and a "remove before flag tag" was added...

Also, the moving controls gaps/edges were painted as black lines to suggest closed gaps with seals for to keep stealth characteristics.

rear view with a red protection guard added to get some colour....

lower view, showing the simple curved shape
 

And there she is!  Out of Black in the Model Collection!