I am going to spray primer on my inner front fenders and underbody. I will eventually spray the underbody with a color coat as well to reduce some of the cost before I send it to the body shop for the oustside body paint. Is there a good gun that shoots both primer and color coat or should I be looking at two seperate guns? My compressor is a 33 gal that produces 8.6cfm at 40psi.

You might want to check out the primer gun on this page. I bought one a couple weeks ago but haven't had a chance to use it. It was suggested to me by several guys and they say it works excellent. It is cheap so you can afford to buy another guy for spraying your color. The gun looks and feels nice but, I have yet to spray with it. http://www.innate.com/Tools/HVLP.htm

The one I am talking about is the Nesco NP 868