My goal is to do a wall-sized stencil. It could be a simple repeating pattern. [2]

Or a pattern that's repeated only a few times. [1]

But it could also be a non-repeating image.

How-to

If I decide to use an airbrush, Harbor Freight has a cheap starter one. I would need an airtank / compressor as well, though maybe Home Depot will rent me one?