Experiences in real life use, how badly will door windows get scratched if they're driven up and down?

 

do they even go up and down? most race cars i have seen with lexan have them fixed in place

 

I'm ordering rear quarters and the rear screen in lexan. I wouldn't do the doors.

 

A full set is available and the price is almost equal to rear screen only. OTH it's fairly easy to switch back to OEM door windows if problems occur. Side windows I'll change anyway.

 

I used a product called Optic Armor for rear side windows making a Jaguar XJS into a Shooting Brake. It looks almost identical to glass from any angle and after one year on the car there are essentially no discernible scratches. It gouges, but doesn't scratch. It's an amazing product. I would imagine that other manufacturers have coatings that work similarly.