Don't tell me you've never been to Karratha ? It's not as bad as Port Hedland, but still plenty of red dust. Nothing to worry about, but a really good panel filter is a must, stop the dust getting into the engine. Doubt the dust is going to damage the paintwork, but it will be hard to keep it clean.
Only other worries you might have is the car being stolen, as Karratha isn't the safest town in Oz, and black cars will get damn hot in the summer sun.