Flat white paint is actually not far from mylar, like 93% or something. I prefer paint to mylar generally, but I use mylar in some areas anyway because it's fuckin' hard to get white paint to adhere very well to smooth laminated surfaces, at least without doing a lot of extra work. Mylar and a stapler, on the other hand, bing-bang-boom, goes right up on any surface you can stick a staple in. Plus, it looks all high-tech. Heh.