Joined: Fri Jul 29, 2011 8:59 am Posts: 3 Location: Cape Town
The Dirt effect: -I use a white primer and lightly spray the areas I want effect. -Let it dry but not completely. (This is kind of a trail and error bit but practice makes perfect.) -While the primer is still a bit wet I then take a very soft brush and brush over it with aging dust.
The battle scratches effect: -First I paint all the part I want chrome scratches with a thin layer of chrome. (This is usually most of the Gundam. ^_^) -Then I paint another layer over that in the final color I want. -Then you just take water paper and sand off where you want your "metal scratches".
I will put up some step by step photos if you are interested and some photos of the products I use.