Kirk,

I use white for most projects because paint covers it very easily (I don't use a primer coat at all). And, any white trim areas can simply be masked off.

The only exceptions to that are for schemes that have large areas of a color that the covering is available in.

For example, I have a Zero in the works that has a completely orange underside (Operational Training Unit colors).

For this, I'm covering it with Orange TowerKote and painting the topsides with Rustolium gloss Dark Hunter Green.

D