I have a 14 year old Volvo (owned from new) which I treat to car shampoo (cheap stuff from Tesco) 4 times per year and Turtle wax (£5 a bottle stuff) twice per year.
Paint is in fantastic condition.
I am sure I am the minority and there will be a long list of petrol heads along soon to turn washing your car into an expensive cottage industry.
Life’s too short!