In this video, I show how you can make your own graffiti decals from pictures of freight cars using pictures that you take.

Paint.net photo editing software is available at getpaint.net. Be careful to click the download link and not one of the ads!

Check out this video from Diecast Resurrection on how to make your own videos:
   • MODEL CAR PAINTING TIPS - Making Wate...  
He also has older decal

I didn't fully realize it at the time, but having done more work like this, the clear decals are much thinner than the white, so you should use them whenever possible