All of the polycarbonate sheet sells is manufactured with plenty of Ultra-violet stabilizers (UV) protection. This means that with proper maintenance of the polycarbonate (also names Lexan) sheet, it shouldn’t turn hazy or yellowing.
Of course, you’ll need to clean the pc sheets with the proper cleaning method, such us using Fiber Cleaning Clothes, and to also be careful to never use such soapless sprays. Glass cleaning spray and other such products contain harmful microscopic abrasives that will cause fine scratching and eventual yellowing of the polycarbonate sheet.
You can also see our blog: How to clean the polycarbonate sheets.
If you need an acrylic product that resists scratching, then ask us about our abrasion-resistant polycarbonate sheet.