Polycarbonate plastic is a popular replacement for applications where glass would often be used. Polycarbonate can also be coated to be used as bullet-resistance glass and has been used in banks, cars and fighter jets due to its similarity to glass as well as its intense durability after a coating has been applied. Polycarbonate can also be tinted and used in sunglasses, building, automobiles and other situations where tinting is required. http://www.plasticut.com.au/plastic-products/polycarbonate-pl...