I really like the looks of that Brew Pry. What kind of metal is it made from and who makes it?
[Edit: I found it (again). How long have you had it, have you had any issues with rusting?]
I'm guessing you found your answers but for anyone curious it's O1 tool steel.
I've had it for maybe five or six years now and never had a single spot of rust, I've never used a preventative on it either, I guess the finish was enough to protect it. I will say though that I don't really live in a humid environment, we get humid days but it's not like some places in the US can be (like Florida). That said I'd be pretty confident that a spritz of preventative (I prefer EDCi personally) would be enough to ensure it against most conditions.
It's my go to pry bar, looks good and gets the job done well (for context in addition to the ones in the pic, I have a small standalone prybar too).