Originally Posted by thesignlady
Go with Lexan for your rock guards it is more suitable. Above Gearheart states which thickness to safely use. Lexan cold forms to the compound curve just fine. I replaced a busted wing window where the PO had previously put in plexi. The plexi was in awful condition with full length breaks as well as being super yellowed and hazy, it obviously did not weather well.
OK, so we're back to my original statement in post#4? The polycarbonate, in thinner sheets can be used in the wraparound, newer rock guards, without heating and make the curve in a cold bend.
Incidentally, I don't think any drilling is required in the newer ones. I believe they just slip in the frame with an end removed and are held, floating, with window screen spline.