I've got perspex in the side windows and rear one piece door on my Van. It scratches easily and fogs up over time, meaning it has to be periodically replaced. What apart from glass are the alternatives? Is Lexan any more durable, or are there other polycarbon options around?

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1965 Mini Van (1360)
1970 Mk2 Cooper S (1310)
1978 Rover SD1 V8 (4.6)
1996 Land Rover Discovery V8 (4.0)

Lexan is better but nothing is as good as glass.

What's road legal?
I'd assume "plastic" in any window except the front would be acceptable, depending on the quality and grade of the "plastic".

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Respect mine and I'll respect yours.

Looks like the best stuff is Lexan Margard. Light, strong, won't scratch easily dues to its special protective coating. Can be bought in a Mini kit from:

http://www.plastics4performance.com/Lex ... 8-301-633/

Or City Plastics in Adelaide do a 2240 x 1220 sheet for $420 +GST.

3mm panel is about 1/3 the weight of equivalent glass sheet.

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Slide
1965 Mini Van (1360)
1970 Mk2 Cooper S (1310)
1978 Rover SD1 V8 (4.6)
1996 Land Rover Discovery V8 (4.0)