In general if you wanna do a complete...
1.wash with dawn...(removes all old crap and previous waxes)
2.clay bar by rubbing the clay and spraying soapy water in a spray bottle...turn the clay bar often. 1 1/2 clay's should do the job.
3.re-wash with "easy on wax" type soap...then your ready to begin.
4. Zaino's 37 step system Z1, Z3, Z6, Z3. Z1.lol..."don't quote me" can't remember the order....9 days later...you should be done.
**get yourself like minimum 10-12 microfiber buffing towels...using old t-shirts/cheese cloth and the build up of wax that create tiny scratches...I learned the hard way.
Before Zaino I had already done like 8 or 9 coats of different products, like mothers, meguires...so I really didn't see a difference. My favorite is Meguires though....zaino is quite the process..mixing the solution, shaking it well, waiting 10 minutes for the stuff to kick in...COME ON!!