How to wheather like this

QUOTE: ANyways, most of the effect here was acheived with a dustcoat, I'd say, rather than drybrushing. Anyways, basically, a drybrush is used to bring out the raised details and edges of a model, and is complementary to a wash. Let's say you use an Olive Drab basecoat. For that, i'll usually mix OD with a little bit of black to darken it, dilute it a lot, and apply the wash. Once dry, I'll take the basecoat (OD) and mix in a lighter colour, like a drop of white, or something like that. This is not diluted in any way. Dip your brush in, and wipe it on a cloth until there is very little paint left on it. Then LIGHTLY run the brush over the raised details of the model, and all edges. Very little paint should be applied, and will in effect be 'feathered' onto the model, bringing out the raised details. The above models went one step beyond that and were dusted. I usually apply a dustcoat with an airbrush. If you have one, a good colour for dust is Tamiya Buff. I make a mix of approximately 1 part paint to 4 parts water, so it's very thin, like a wash. Then I 'mist' this mixture over the whole model, applying a heaver coat over the running gear and lower parts of the model, where dust accumulation would be greater. If you don't have an airbrush, you can dust your model by using chalk pastel (you can buy them at art stores or even your LHS, if they carry them). Grind the chalk pastel on a piece of sand paper till you have some dust. I usually place this dust in a water bottle cap for easy storage and usage. Take a soft bristle brush and gather some dust onto it, then just spread it all over the model, again, focusing on the lower parts and running gear. You may want to post on the Techniques and Painting and Airbrushing groups, as I'm sure people there have links to guides. I have some, but for the life of me, I can't rember, and I don't have them bookmarked here at work. Good luck. DOn't be discouraged if you don't like the inital results, just keep practicing