For most of my spaceship models, I use Light Sea Grey, from the Model Master range of colors. Gunship Grey is a little too dark and blue.
Here's some 'in progress' shots of some Jedi Starfighters I built last year, so you can judge for yourself. I used the same grey inside and out.
The 'white' striping on the red SF is actually Camoflage Grey. If your looking for a 'not-quite-white' color, that's what I would recomend.
I don't wanna Thread-Jack you, so post when you see these pictures, and I'll take 'em down.
-JC