I was talking with my chassis guy about doing my lexan windows. He was telling me they make a lexan with a coating that actually sort of repels dust. Told me if I did a little leg work searching for it, he would take some off the bill So just thought I would post this.

It's called Marguard, more expensive than straight lexan, but stays a lot more clear without the hazing and streaking of regular lex.

It doesn't "repel dust", it is "abrasion resistant". They put an aluminum oxide coating on the surface. You can actually buy it with either one side or both sides coated. Most plastics suppliers won't have it and will likely only sell you a skid of it. Your best bet would be to find a big roundy-round shop. You could try MotorState or Allstar but they're distributors, not retailers.