[JimD]

I hadn't really thought about it. I rarely have people in the rear seat and when I have they have usually thought the air was fun. My daughter asked me to put the top back up, however, but that was partially temperature.

For a windscreen to work, it has to block the air coming around from behind. So a windscreen for the rear seat would have to go behind the rear headrests. Mounting to the headrests seems possible - for both front and rear. But the front seats would have to be in the same position so maybe that is impractical. But the rear seats should work. It would make an interesting project. I mainly do woodworking but a wood frame with a metal mesh screen should work.

Jim