Sure thing Rob
Weathering was done using a series of steps, involving painting the model. Then it was done with thinned oils and chalk pastels.
There are a lot of steps to the painting, but I'll try to sum it up in a nutshell. I used Testors Model Master enamels.
First coat was Camo Gray for the undersides. I used this color instead of Insignia White, because the aircraft were dirty, and Camo Gray, looks the part of dirty white. then I masked off the lower surfaces.
Uppers were painted flat black first. Then the Intermediate Blue, applied in a streaking fashion to give the illusion of Intermediate blue, but covering, AND letting the black bleed through a little. Then masked this loosely, because I wanted the demarcation line between all colors to be soft
Upper surfaces were painted the exact same way. Color was applied over the flat black in a streaky manner to give the illusion of Dark Sea Blue,and letting the black bleed through. Streaks were done in the direction of the airflow on both the wings, AND the tail planes. On the fuselage however, the streaks are done cross ways, to simulate drying stains and oxidation from rain and sea water.
But your not done yet. when putting on the first coat of Dark Sea Blue, the passes you make make to be quick and relatively close together. This goes for both the wings, tail and fuselage.
Next, lighten the base coat a little, with some light gray. Just a bit. repeat the passes, but widen the gaps between passes. Repeat again with a still lightened version of the base coat, widening the passes further still. You can do these steps as much as you feel you need too, to get the desired effect.
It may look drastic at first, but, when
you beginning applying your clear gloss and flat coats, it WILL tone it down a bit...
First pic is camo grey...
Now the black on the upper surfaces, before any other colors are applied...
Now the paint is on, and the streaks are VERY obvious.....right now at leastLastly, with the clear coats and decals applied, you can see how all the streaks have been toned down a bit
Add a little thinned oils.. I used a thinned neutral Gray for the upper surfaces, and a grimey brown/black for the lowers.
I hope all that helps someone out. It's a lot of steps, but in he end, it looks prety good on a model, especially if you are looking to make her LOOK like a combat aircraft