Oh, about as stealthy as a metal golf ball, painted black?
Put it this way: If you shine a flashlight at a cosmetic hand mirror, does the flashlight shine back and hit you in the eyes? Now tilt the mirror so that the flashlight doesn't blind you.
Stealth surfaces are supposed to work like a tilted mirror.
Now imagine a polished chrome golf ball. If you shine a flashlight at it, you'll still catch a bounce from the flashlight reflection, even if the surface is dimpled.
Compare the chrome golf ball's performance to an icosahedron faceted with mirrors. The faceted platonic solid is less likely to shine the flashlight back at your eyes, depending on it's angle of rotation. And a dodecahedron would perform even better.
Put it this way: If you shine a flashlight at a cosmetic hand mirror, does the flashlight shine back and hit you in the eyes? Now tilt the mirror so that the flashlight doesn't blind you.
Stealth surfaces are supposed to work like a tilted mirror.
Now imagine a polished chrome golf ball. If you shine a flashlight at it, you'll still catch a bounce from the flashlight reflection, even if the surface is dimpled.
Compare the chrome golf ball's performance to an icosahedron faceted with mirrors. The faceted platonic solid is less likely to shine the flashlight back at your eyes, depending on it's angle of rotation. And a dodecahedron would perform even better.