Painting. Options

[dabbill]

I am getting ready to do some body work to fix, a few dents / scratches. Around the first of the year I am going to try for a body kit. I am going to repaint it the same color, cause for one I like teal, and two there is like no teal ones where I live. My question is should I just shoot the car, or should i sand it all down, and primer it then shoot it. I would think I could just shoot over the old paint, sence I am not changing the color.

[dabbill]

Why would I want to primer the whole care if I am leaveing the car the same color? About the sand blasting, my dad has a low powered sand blaster that he hooks up to his air compressor. He used it to take some surface rust, and paint off his mustand, and it didnt mess up the metal at all. I know about primaring the areas that I do body work to. Still just a little confussed about why i would want to primer painted areas that are going to stay the same color.