I had my car checked for rust today. I have it done once every year and it's definitely worth it!
For only $99, you get the following done to your car:
*. Rust check & re-spray, particularly for under body of the car.
*. Re-spray of paint coating - smell and look like a brand new car in a showroom.
*. No more light scratches & ugly dents - can't completely remove deep scratches & dents though, but it looks much better!
*. Clean interior (ie. they do the vacuuming).
By the way, they need to have your car washed at least two days before the inspection to remove muds and other excessive dirts. If you haven't done so, they'll wash your car for only $10.
The inspection & re-treatment of your car prevent the paint from fading and/or damaged by birds' dropping (act like acid to your car paint here in Australia). You can also expect extra re-sale value in the long run. So, you might want to get the paint protection and rust proofing when you get a new car.
The place is called Beam inspection centre in East Perth. They also have several inspection centres at remote areas.