Try Gyeon rim, you get twice the amount of product for basically the same price, proper application suede cloths and block with a dropper. I've always used C5 but thought it was starting to be ridiculously priced compared to Gyeon, went over and I wouldn't go back. I actually think Gyeon is better in terms of repellency.
On the subject of wheels their Gyeon tire is bloody good stuff too.
Gyeon Tire Q2. Leading by a mile.
https://f30.bimmerpost.com/forums/sh....php?t=1653812