This was a fun workout.
I almost lost it too; turning on the computer one morning to find computer not turning on >.<
Based from this pic: http://img219.imageshack.us/img219/8223/sonsofanarchy1x04005.jpg I just felt it needed a little something :D
For the leather jacket; I just painted in the tones as I normally would with the airbrush, then put a leather texture photo over the top and worked it in with a little Doge/Burn tool for the highlights and shadows. I really love adding in bits of texture like that!
Photoshop CS5 + 20 hours or so.
Airbrush + Texture brushes.
Dodge/Burn and Sharpen/Blur for finishing touches!