CDs are polycarbonate and shatter sharp. Maybe there is polycarbonate that doesn't. Autoglass is required to shatter into slightly dull bits. Pitting would lik

CDs are polycarbonate and shatter sharp. Maybe there is polycarbonate that doesn't. Autoglass is required to shatter into slightly dull bits. Pitting would likely also be a problem causing reduced visibility. Aircraft stay above most land blown grit.