My Red SC430 has several layers of Zaino on it Z5/Z2 and two weeks ago topped it with Souveran Paste.
BIG DIFFERENCE after two coats! Now maintained with Megs FD.
If you have Zaino on it now and have access to P21S, I'd give it a try. Really nice on darks!
Hey, if you don't like it, remove the wax, that's all.
Between FD and QS for quick detail products, you just can't go wrong after using a wax over Zaino!
If I could get some good weather so I can get pics up the way it looks now!
Regards,
Deanski