Hi guys,
The OD and Tan finishes do appear to be a bit more durable, when compared to the Black models, at least from what I can tell handling them here in the store. They are a fairly thin coat, however, and that just seems to be how the GSG factory is manufacturing the GSG and Sig 1911 22s. I understand that the factory has improved their formula / process over earlier GSGs.
Sadly, I can't say how well these will stand up over time without actually seeing it for myself. Hope that helps.
Pat
Blue Line Team