I was crawling around under my car last night and noticed something that bothered me a little. The mount for the right rear suspension trailing arm has some surface rust on it (the left one may be the same, but it's not as conveniently visible with the car not jacked up). It doesn't look like a big deal -- similar to what you'd see on an unpainted length of drive shaft or something. I'm talking about a part that bolts to the body and provides a pivot for the trailing arm and its bushing to rotate around. Here are the best pictures I could manage without lifting the car: That right image looks more dramatic than it is. There's a darker spot, but there's no missing material. I've got to assume this is OK since they apparently didn't bother painting these parts. I do not live in a rust-prone area. Should I be worried?