Also...when does Anita ever do any gun maitenance?! Come to think of it, I don't recall her ever having to oil or clean them, or deal with rust (which can be caused by simply handling them).

Exactly! For an author who prides herself on such realistic details as firing a gun underwater, you'd think Anita would service her "trusty little Firestar" once and a while, considering she fancies herself a Badass Who Knows About Guns. The only maintenance i can even recall didn't even deal with a gun; I believe Edward sharpening and oiling knives somewhere in OB. She keeps that other gun strapped to her belly, and its probably destroyed from her nasty flesh sweat and ghoul juice.