I didn't write my post for you, it was to reassure the OP about his rust concerns. I don't know if the rust on the inner chainring faces is because they're rusty, or transfer form the chain or smaller rings (via the chain).

But you're right that the bolts are showing some rust also, and maybe the OP should give the crankset a shot of our old favorite WD-40. I wonder if he's doing lots of wet weather riding, or maybe storing it outside or in a damp place. If so, he'll need to protect steel parts with an occasional spray of WD-40 or similar (I prefer LPS-1, but it isn't as readily available).