Welcome!
That is a sharp looking bike. I hope the cast isn't on much longer because the season is getting onward in Nova Scotia.
I've checked out Plexus' site; in one part it is a polish, in another it is a cleaner. Hmmmm....
As with my car, I have always used Nu Finish on my bikes after washing with a vehicle cleaner and allowed to dry. You can get it at Canadian Tire, Wal-mart, etc. It is easy to apply and the colour really shines through. Bugs and dirt wash off really easy too. You're left with a silky smooth surface.
Keep it between the ditches.