You can change the colour of the flyscreen frames to any shade or pattern at all by using sticky backed adhesive plastic covering that you can buy very easily in a DIY shop. Just take your time and cut of the excess with a sharp knife and you can get a great finish. The first picture below is a white aluminium roller cassette that has been covered in wood grain finish.
Below is a section of frame , quite a complex shape that has been covered in sticky backed plastic giving it the appearance of a wooden frame.
