The previous three cars have been bought with about 20,000km's on them.
We got Duraseal coating applied to the last two, which made cleaning easier for a few years.
When we sold them after 12+ years, the cars were at about 200,000km, and the paint was looking sad
The Model 3 mechanics and battery should last well over 300,000km, or 15+ years for us.
This is about $6500 per year ($100,000 / 15years), ignoring resale value because at this point it is insignificant.
The problem is I still want my 12+ year old car to still look smart.
The STEK DynoShield has a 10 year warranty, like some others, but also includes a Hydrophobic top coat.
I imagine after a few years this top coat may degrade, and I will need to ceramic coat it. TBD.
Also I imagine I will need to get the PPF removed at about 12 years because the edges are lifting or the glue is yellowing.
With the PPF removed the paint should still be pristine
(Yes wishful thinking...).