On mine the patina is starting to show up on non polished surfaces. I've a Portus Cale with white lume and I can confirm it's weaker and lasts less than the C3X1 on the Adraga.Oxidation starting to kick in on mine. Even with the bronze being polished. Starting to get some signs of patina build up.
The type D lume is significantly stronger than type C (WL)