Context: the car has 170k miles over 13.5 years.
Exterior: I obsessively applied Klass AIO and SG to the car every 6 months for about the first 3 years of ownership. I haven't washed it or waxed it since then.
I don't know how the paint is in good shape.
Maintenance: I did just about nothing other than oil changes. I attempted to change it every 6-7k miles using Mobile-1, but sometimes forgot and it was more like 8-9k. That cylinder head sure look cleaner than I was expecting.
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