Indeed. I'm still fighting the temptation to top C1, how it can bead and sheet like day 1 is fascinating, honestly it's the best protection i've seen since I started detailing. I always said it will be the first thing I would do on any future car I own.
Then if you want to top the wax for some looks you'll be fine. It'll last maybe a but less than normal but you'll still have the C1.
What sort of prices are you talking for a treatment of C1 (it's trade only isn't it?)