remember Zaino is a really good sealant. I use Zaino twice a year on my car and top off with a nice carnuba wax.
I normally do two coats of Z-5 ( swirl remover ) then two coats of Z-2 ( polish ). In between coats its a good idea to spray down with the quick detailer.
the directions that come with the kit are pretty good
definitely use the quick detail between coats, it makes it a lot smoother. You don't need a lot of quick detail to get the job done, just a short burst from the bottle.