As others have said, the factory finish on Nogaro alloys is diamond cut.
Does anyone know if this was a factory option? It's a 16 plate company car with 15k miles on it, so I can't imagine they've been refurbed but I'm slightly disappointed as I think they diamond cut looks a lot better.
They could easily have suffered kerb damage in 15,000 miles or less, which might’ve been the reason for them having been refurbished.
White worm corrosion in under 3 years on a low mileage car isn’t unknown either; clear lacquer applied directly to a diamond cut surface isn’t a particularly durable finish - especially if the wheels are kept on the car throughout the winter months. Two of the diamond cut alloys on my low mileage mk6 GTD succumbed to white worm corrosion in around 2.5 years, and my wheels were always kept well protected from the elements with multi layers of wheel sealant, and any damage from stone chips repaired immediately with a clear lacquer touch up paint pen to stop the ingress or water under the lacquer coat.
Given the choice between a diamond cut and a painted / powder coated finish, I’d always choose painted / powder coated every time, and I really like yours.