Ask the same question in the Traditional forum. Lots of owners of Queen's D2 blades there (including me). I think you'll find it doesn't ordinarily rust very easily, and patinas a little bit. It's often referred to as a 'non-stainless' steel, but it's just barely not stainless. For the most part, it does pretty well. As with any steel though, there can always be exceptions (acids, chlorides, chemicals, sweat/body chemistry can make a difference for some). And the blade's finish can also influence rust-resistance; polished blades do better.