Paint gun recommendation

I have totally stripped the interior and would like to paint it before I start the exterior. My question is I am going with a complete new color. Should I use the same gloss as the exterior or use a satin. I know the dash is in satin and Ive read a post where someone was complaining about fingerprints on the doors and such. Also how do you treat the plastic parts? Do they have to be treated differently than the metal? I'm talking about the hard plastic below the rear window and the 2 pcs inside the windshield post. This is on my 65 Barracuda.
My son wants to paint the car hugger orange, I was going to be more conservitive but I did buy this car for him. Do any of you guys have a picture of an orange barracuda with white or black stripes you could post so he could decide if that is what he wants.
thanks