If you have access to an air brush use Parma Faskolor or Createx paint for Lexan. Createx can be gotten at most art supply stores while Parma Faskolor can be gotten from some if not all hobby shops. They are both water based paints so clean up is easy. Just spray on one LIGHT coat at a time and dry each with a hair dryer. The heat from the hair dryer helps the drying paint to adhere to the lexan better. I've hit corners full throttle bending the bodies like an accordion and the paint never cracked or flaked.