You're going to get a number of opinions on other products, but if you're going to choose Zaino, I suggest you look at
www.zainobros.com, and purchase one of their kits.
I've been using Zaino for a number of years with great success, and as a result, I also do detailing on the side (people request Zaino after seeing my cars).
You'll find ALOT of useful info. in this section as well. Browse the detailing section, and if you don't find answers to your questions, drop me a PM and I'll help you out.
Ed