Hi to all,
I worked with vinyl plotters for a long time, and the possibilities for stencils on paintmask are endless. Just draw or write anything you want in Illustrator or another vector software and plot it. Next step is applying said stencils on your wall (paintmask has sticky backing) and add paint. Great thing is you can make additional stencils for drop shadows, other colors, etc. A vinyl plotter can be hard to find though, and the process can rapidly become expensive, but considering how great your buildings look, it might be a sound investment.
Also, I know Woodland Scenics sell dry transfers designed specifically for that purpose, but from what I've seen they're clearly designed to be used in a late forties, early fifties settings (some of them would be great for Atomic Cafe). I'm sure some other company offers a more historically appropriate product, especially in Europe.
Yours truly,
Sir Dryden