I think Z5 is just a polish and Z2 is the protectant. The instructions say to always end your Zaino application with a coat of Z2. I'm sure the real Zaino experts will chime in as they always do. Zaino rocks...time for some Z6 (now you see my problem Frosty!).TotalImmortal said:Does Z5 protect your paint like a wax, or is just just for cosmetics?