mustache rash
Go Kart Champion
Pardon my ignorance but does the fairing grab onto the front bar, right? And then it sits on the paint via rubber strips?
Yes.
Does the bottom of the fairing rub and permanently wear away at the clearcoat/paint? Or do you have like 3M clear film underneath?
No. If you keep the paint clean it will not mess with the paint. They sell 3m film for protection but if you use common sense you will not need it.
Does it mute wind noise well/ how is it on the gas mileage?
The fairing have a major effect on reducing noise. Gas mileage is the same with or without the fairing.