We had this discussion on the other forums, and Viper told us as follows
On Friday, you can use your event paint for the pump and open games, ( I plan on uisng the free bag of 500 for the pump games
), or you can buy the field paint from CPX and use that, should be about 80 bucks for a case of marballizer if I remember.
On Saturday and Sunday you can ONLY use the LL5 Event Paint (Evil I believe), and you CANNOT use the the CPX Marballizer paint.
If you get Marb's for Friday though, you can bring them back after the event and use them at CPX at al ater day.