Yes, Clay the car. As said above, most cars are shipped via rail where rail dust settles on the finish. Also, the cars sit on the lot where they sit and accumulate further contamination. CLAY IS NOT AN ABRASIVE! (if used properly with sufficient lube). Really, the clay never actually touches the paint, it is always seperated from the paint by a thin layer of lube. The clay shears off the contaminants sticking out past the lube layer and are embedded in the clay.
The Dawn wash is an essential step in any Zaino System. Zaino utilizes a polymer which bonds to the clear coat, if you do not wash with dawn there will be a barrier of old wax between the zaino and the paint surface, not allowing the Z to bond properly. The Zaino will not last as long if the dawn wash is not performed (as it will break down once the carnuba wax beneah it breaks down).
As far as Dawn being bad for the paint... The dawn does not necessarly lube as well as a car wash soap does so it may introduce more swirls. So what I do is make a wash with Dawn and car wash soap which does the trick for me. The reason dish wash soap is thought of as "bad" for the finish is that it strips the wax off, which is what you want to do in theis case...
Dude don't do this. The wax has an agent to remove the former buildup if it is any good. Dish soap is not a good way to remove the wax it also screws your paint...
Nope, not Zaino. Zaino does not contain any cleaning agents (chemical or abrasive). Zaino Z-5 and Z-2 waxes are simply protective waxes.
I use Zaino myself as well as Klasse. Klasse is an acrylic wax from Germany. It is a two part system (All in One (AIO) and a Sealant Glaze (SG) ) This is another great product similar to the Zaino system.
www.topoftheline.com sells the klasse.
www.zainobros.com for zaino.
Not sure if you have used Zaino before, but when you do end up applying it, apply the coats VERY thin, VERY VERY thin, you should be able to barely see it. This will give you a better result as well as make your products last longer.
HTH
I know, I know they Zaino seems like a lot of hype, I felt the same way. Onec you actually use the product though you will be hooked.
This is what I would do:
Dawn Wash
Clay
Wash again
Zaino
Enjoy!