I got my Intuous 5 Wacom tablet the other day and I've been trying it out on a lot of different stuff so I thought I'd spruce up my Avatar. So I thought I'd go back to the source image (the one with the gun by another artist) and re-do mine from scratch so here is the original I worked from:

That is actual size and it's a pretty degraded image actually.
And here is my version before resizing for my Avatar:

I've added rain, splash marks, painted over the image using my wacom in a stylised fashion (oil brushes) and of course I've removed the gun because I just don't like that part of the image.