There are four Dometic Seitz S4 windows in the Camper made from polyplastic. They all have pull-up blockout blinds and pull-down flyscreens; these clip together (usually with great effort). The window blade hinges outwards from the top, held in position by one or two friction window stays.
In off-road use along narrow tracks, the window surfaces rapidly get scratched. There are kits available to polish out these scratches, but it takes a lot of effort.
Further, after much dusty travel the window blinds become harder and harder to raise and lower smoothly, tending to bunch up on one side or the other. The same thing happens if pillows or other objects rest against the windows.
wooden strips stop kinking of blind.
The issue with pillows is obviated using two vertical wooden strips held in position on the inner window frame using Velcro.
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