here is my .02.
I wash cars for a living, and there is a reason he is the only guy left on earth doing it that way.
If your anal, like me, and also happen to own and operate a Hand Wash and Detail Center, then you could probably get away with just rinsing the car off with fresh clean water every day, which is exactly what I do since I can.
There is no wax on the market that will last a year, period. There are sealants and exterior protectants that can last a year, though I don't sell them because I prefer to see my customers much sooner then that

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-Carl
Silver XE 4x4
5-Speed