Its not just zaino. IMHO you should be following the initial steps no matter what you finish with. Wash, clay, wash, polish is what I did for the first time. I used zaino so I had a added step of using the Z1 for the first time this year, but after that I wash and I just use Z2. Its so easy to apply that I probably put it on every other time I wash the car. I really like that fact that you can put it on in the full sun, and that it comes off so easily.
Addictive anal rententive behavior? I suppose, but what do you expect, I hit the car with a leaf blower after I wash it to get the water off.
Jesse