Good wax every 3-6 months depending how anal you are. Good sealant lasts a bit longer - maybe 12 months.
I think Nanolex is popular among the time poor.
Your best bet is to talk to the detailers. My mates in MEL go to Damien at Final Inspection about every 12 months.
CCP can probably tell you who their melbourne person is for nano-technology sealants.
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