Projecting movies, slides or PowerPoint presentations onto an empty wall in your office is a fast, easy and professional way to engage a client without having to spend big bucks on an expensive screen ...

This method of building your own projection screen is new to us. [Sean Michael Ragan] ran across some sand blasting material made up of minuscule glass beads at Harbor Freight and inspiration struck.

I like this idea of paint-on screens. It makes sense in that unobtrusive modern way. Granted most white walls would be sufficient for projection, but if you want something more specific consider this.