The official name of PlexiGlas is acrylic. Try to avoid using acrylic on your robot at all costs; as up until a few years ago it was actually illegal to be used on a FRC robot. What you really want to use is called polycarbonate. The best known brand name of polycarbonate is Lexan. Polycarbonate it very strong, is used in some bullet-proof applications, and is nearly indestructible. Polycarbonate can be cut, drilled, heat-bent, machined, and much more. Spray paint takes well to polycarbonate, as long as you didn't paint the protective layer.
Polycarbonate also costs a lot more, which is why FIRST made acrylic legal to use. But in the long run, if you don't want to worry about having parts shatter, use polycarbonate.
