These threads should be of some interest to you. The last one is my personal thread all about detailing:
Elise and Exige S detailed again... Zaino vs Carnauba
Polished and sealed with 8 layers of Zaino Elise...
How to detail your Crossfire!!
As for Griots, well, I haven't tried it but I bet it's ok. But there are better protection systems (wax or sealant) that last longer. If Zaino is too confusing, complicated, and time-consuming, try Collinite 476S.