PS: I have to admit that the word 'detailing', in the sense that you've used it, is entirely new to me.
I've never really seen much point in washing cars at all. Even if I won the National Lottery and bought a half-million pound supercar, it would only get washed by the guys on the Tesco car park once every few months.
As far as I'm concerned, life's far too short to waste time on washing cars!