Ahoy, Bob!
Just like mixed nuts, you're going to get as many opinions on this subject, mate. . .the best thing to do is to listen to all methods described, and try them out, and then stick to what works best for you.
Personally, there is no other alternative than an airbrush or a rattle can for ship hulls and decks, but superstructures, I usually build and paint as I go, and then add them to the ship assembly as they are finished. . .same as with other fixtures (ie, life-boats, etc) that are to be a different color, I paint first then add to the model later. . .but that's MY method, and what works for
you may be different.
My eyes and hands are just not what they used to be, and this is what works best for
me . . .it amazes me how some guys can assemble an entire ship model first, and then go back and detail paint the whole mess. . .20 years ago, not a problem!
Keep Modeling!
~Gunny