I actually had an issue with the C1, EXOv2 and have been talking with Rob, the managing director of GTechniq in the UK, and he informed me that the issue may be that the C1 is too hard when the EXO is applied. I left the C1 on my car for close to two days, because I assumed that the longer I waited, the better, and since the directions said at least 12 hours, 36-48 would be even better. Well, looks like that was a mistake and the haze appeared about a day or so after I topped with EXO.
I have to say Rob has been fantastic with taking care of the issue and is making sure that I am 100% satisfied. Also, I have given him a lot of information regarding my application, and they have pretty much figured the problem out and will correct the problem so no one has to deal with it in the future.