Paint oxidation

Any ideas how to replicate oxidation convincingly?

http://img.photobucket.com/albums/v417/willimo/exterior_roof.jpg

Someone's bound to have some trick up their sleeve.

Thanks!

I was thinking Tamiya flat base with a touch of white, dabbed on with a paper towel or something.

Edit: Nope. Niether Flat base by itself.

The only way....time...and shitty clear coats...sunlight...and more time. WTF Will...go be a scientist!!! All these ridiculous questions!!!! hah

Ok...so...I actually got something similar to that, spraying in the cold. The paint flashes and fogs. Looks shitty, but about what you are looking for.

Try rubbing out a basecoat/clearcoat color off of a white or light gray primer. As the paint is rubbed away the primer underneath will begin to show.

For a more rugged appearance, paint on thin coats of liquid mask onto the primer and then paint the color coat. When the paint is completely dry take some tape and place that over the areas that were masked. Peel the tape back and the paint over the mask should come with it. Then apply fresh strips of tape over the mask to remove it.

You can also use very salty water as a mask, then remove the mask by immersing in warm water for a few minutes.

Finally you can top coat the paint with some light gray in a selective spatter pattern. Then cover the general area with a coat of flat clear. The flat clear will make the spattered paint not look as if its on top and will give a dull appearance to the area for a more realistic worn look.

Y'know, that photo looks a lot like what happens when you don't sand a primer coat super smooth before painting and then rubbing through the paint.

Oh wait, that's almost exactly what the guy above just said.