Because racecar!
Special Treatment Part 1, All you wanted to know about WPC > MotoIQ - Automotive Tech, Project Cars, Performance & Motorsports
WPC Treatmemt Saved Our Engine!
I still haven't seen anything that's not marketing on coatings on normal cars, or air cooled engines.
I've got ceramic coated cast iron headers on my landcruiser. It's held up fine through some pretty bad abuse, but it also doesn't seen the number of heat cycles a daily driver would.