Unless Z5 has improved or you have a ton of swirls, I wouldn't bother with Z5. I will admit though, I haven't used Zaino in a while (still great, I just like trying out other products), but Z1, Z2 and then Z6 and Z8 should do it. You can top it with a wax, but unless you have a dark color (red or black), you probably won't get much out of it, and I'm not sure you'd get better results over a dark color either.

I'll let others with more experience with Zaino chime in though.