Please see the pictures. I am driving 1,000 miles next week. I will bring the car to the shop for oil change and check ups, but should I worry about that? I hear some noise on the passenger's rear side when I drive slowly and stop. Other than that, I don't feel any problems on my driving experience.

The rusts are on for all four tires.

 

The rust you are seeing is not on the rotor to brake pad contact, so it does not affect performance. This type of rusting is common if you drive in an area that sees snow and salt.

This is common.

 

I couldn't go a week without getting rust on mine. It's really nothing to worry about besides aesthetics. You should totally paint them black though. It looks so much cleaner

 

Is it just me or is that rotor smaller than it should be? I don't see that much dust shield on mine..

 

LOL, it does huh? May be he has the A/T disc brakes.

 

The rust is nothing. Athough the rotor surface shown in the picture looks fine, if you're hearing some noise I would definitely look at the inside surface and pad carefully with a flashlight. You could have a stuck pad or slider or the pad may be worn unevenly on the inside. It's really hard to tell unless you get down there and take a real good look with a wheel off so you can see everything clearly. And don't just check that one wheel do them all while you're at it.

 

So wait... RX-8s in Texas, Arizona and California don't get this rust? Now I'm depressed.

 

I put new rear rotors on and took care to carefully paint the hats with high temp paint... came out great and put them on and was really happy. Then a week later I have a nice "ring" of surface rust between the nice silver disc surface and the hat.... sigh...

I guess you could apply paint up to that point, but then you are really getting close to the braking surface and its probably not worth it.

TN resident here. No road salt, just humid.

 

You could and you should unless you like the look of rust... epoxy works best, high temp 'paint' no so much.