rust on an 02 V6

I own a 2002 V6 Mustang which I purchased brand new in January 2002. I have so far driven this particular car thru 5 brutal winters. The body of the car looks okay. The undercarraige looks okay too. The only things which will definitely rust is the muffler, all the suspension bolts, and any metal screws, metal bolts or metal clamps which are located underneath the car. Another thing is that salt will get caught in small crevices like underneath the doors and underneath the insides of the front and rear fenders and undercarraige. With time, rust will start to appear in these areas. There is nothing that you can do about this. Just try to spray these areas on the car really good when they get all caked up with salt. Rust is innevitable in these areas when the car is driven in the salt during the wintertime.