Depends on what you mean by detailing session.
For me a detailing session includes surface prep and coat of wax. To some people it means washing your car.
You have to wash your car atleast once a week.- what other option do you have?
If you want loads of depth and have time then you can use carnauba wax after washing. If you are a busy man like doctors, etc then sealant base and topup with natural wax monthly and detailer spray wipe every week.
Personally I wash every 1-2 days or when the car is dirty and then I top it off with a carnuaba wax. Detailer spray depends on my mood.
When im busy like in school days whem exams are near the car has sealant base and 2 layers of carnauaba and a thick layer of dust:P
Anyway wash minimum every week and make sure you have some form of protection on the paint-be it a coating or a wax or a sealant or even a spray on wax.
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