yeah, if you're doing this, it's going to be a multi-layered stencil, looks like you'd want 4 layers. I'm not sure about silk-screening, but paying a sign printing shop would be much easier, although just getting some non-water based acrylic paints and a paint roller would be the cheapest route. Whichever route you go, I wish you luck.
I forgot to mention, this website has a lot of info on stencils, including how to apply multi-layered stencils:
Stencil Punks