Thanks, blackcollar!
I've had a chance to do a bit more work on this sweet little jet: I applied a quick oil wash of black burnt sienna to all of the panel lines.
I wipe the excess wash away with a q-tip dampened with Humbrol thinners, drawing the color along the slipstream.
Now on to the filters. There's no better way to break up the uniform nature of the model's colors, imparting a greater sense of scale and dirtyness. Dabs of oil piant, straight from the tube, are spotted here and ther long the fuse and rudder- don't forget the gear doors!
Take wide brush, again merely moistened with thinner and work the dabs of paint out over the surface of the model. The ideea is not to make a wash, but a thin film of paint to modify the base coat. Clena your brush often, so as to keep the effect from becoming a monochrome.
On the fuselage and its components, draw the film of paint down in vertical strokes.
The tailcone was painted black, the given a thinned coat of bright silver. Bands of transparent brown, blue and yellow were sprayed in rings to simulate the effects of jet blast.