Build a sandblaster of course!
Had an old, out of date, propane cylinder that was just going to get recycled anyway, so I decided to make something useful with it. A friend used it to sandblast his tractor, so that's how it ended up Farmall red. Now I just have to find an excuse to try etching some glass. The laser can do it well enough, but it takes forever to raster anything of decent size. I'm thinking a stencil will go way faster.