So I had the same exact question.
Just got my car back from being coated with Crystal Serum Ultra and 2 coats of EXO on top.
Been trying CarPro Exh2o and it seems to work pretty well. Also just tried a mixture of Ech2o and Reload combined. Also seems very nice.
Wanted to ask about the gtechniq C2V3.
I have read somewhere recently that it wasn’t meant to be applied on top of EXO and it was advised not to apply on top of EXO. Instead it was intended for their crystal lacquer.
Is there any truth to this?
I was going to try and stay in the GTechniq line if it worked well, but I certainly don’t want to waste time or money on a product that’s not compatible with my Serum Ultra/EXO coating.
Thoughts?