I got the idea to this one from another one, i can't remember the author. But use away...
the program is PSP9.
I won't show images.
1. make a new pic, dimensions doesn't matter. Fill it with a semidark-light grey, one that looks kike metal.
2. Go to adjust>add/remove noise>add noise. Check the random and monochrome boxes/radio buttons. The amount setting can be whatever you like.
3. Go to effects>distortion effects>wind. The settings can be whatever you like, but the harder the wind strength, the less brushing will appear.