thus far, I know that Pledge is probably the best and easiest, cheapest quickwax for a bike, period.
2.) I know that RainX is NOT RECOMMENDED for plastic, only glass.
3.) Beading up is NOT a good thing on a windshield, because how the heck can you see through a curtain of bubbles? We need water lo disperse, like Rainx on glass - I'm using RainAway at $13 a bottle, but I have to be going over 55 mph for it to work like RainX at 35.
Gonna try Plexus next, or the LP Acrylic Polish and sealant. Many hours of research haven't given me any solid answers yet, including from this thread.