I really like stencil art, but am not rebellious enough to go desecrate the city streets. Cutting stencils out of heavy cardboard requires a lot of patience, so instead I've opted for generic computer paper. Of course, this renders the reusable manufacturing aspect of the stencil obsolete, as paper of a certain gsm weight can only withstand soaking so much paint.
This is, the disposable stencil. Sharpen your exacto blades.
Step 1: Find your reference image!
Step 2: Tracey tracey TRACE!
Sure, there's a mass of lines in the example, but I actually traced the 'separate colours' on a different layers so I could print them out on different pages. I think this step could easily be achieved using your basic MS paint too.