Ex has Carnuba in it for a better reflection for dark colored cars . IMO the EX and EXP will take off any carnuba that the pwc left on. If you don't feel good about it just try the PB's Pro Polish first and then your sealant of choice.
Good question as I like to put carnuba after my sealants not before..I'm curious as how the other members respond..Aloha
I've topped PwC several times with EX and EX-P. It has a different look vs. topping SSR1. (I really like the PwC/EX look on black). I'm not sure if EX removes the carnuba, but I can tell you that I haven't had any bonding issues. Maybe Steve can chime in.