Meguiars #17 Clear Plastic Cleaner, 8 oz Bottle Safely cleans discoloration and removes fine hairline scratches from all clear acrylic or polycarbonate plastics. Apply a small amount to a soft, 100% cotton flannel or Blu-Velvet microfiber buffing/polishing cloth, work into the surface until it hazes. Buff out with another soft, 100% cotton flannel or Blu-Velvet microfiber buffing/polishing cloth. Stubborn discoloration or scratches may require multiple applications. Follow immediately with an application of Meguiars #10 Clear Plastic Polish. Use on convertible top windows, light lenses and helmet visors.