Steven,
I can only speak from seeing AsboJohn's, the Gulf M3W and the factory SuperDry production ThreeWheeler recently but none looked shabby or poorly constructed (as per your comments). That said, I imagine the M3W needs to be treated somewhat like a motorcycle and as far as I know, most bikers who like to keep their bikes pristine, always dry them after a ride in the wet (hence the saying when a bike is shabby, 'ridden hard and put away wet', to describe one that us uncared for).
The best person to answer your question would be AsboJohn because he has at least 2,500 miles under his ThreeWheeler belt, so is well positioned to give you a real world perspective.
