I just picked up an 88 Mustang.. The body is it good shape, but is starting to develop a little surface rust. This is my project car, and right now I dont' want to spend the money on a paint job. If I were to sand it down and primer it myself, would this be a solution to stop the rust for about 2 years while I work on it? How do I go about sanding it? What do I need to know in buying a sander? What grit? Is this a bad idea, or am I thinking in the right direction?