As an air-brusher I would suggest the following:
Paint as much as possible off the model. Practically all fittings individually stuck to a base with say blu tack or double sided tape and same colour items sprayed in single batches. The idea is to make masking (the key to airbrushing) as straightforward and hence accurate as possible.
Paint superstructures with minimal fittings attached. If possible spray in sub-sections so as to keep masking as simple as possible. e.g. the double height forward structure would be airbrushed as two separate items.
Deck airbrushed with minimal fittings attached. e.g. no turrets, bollards, stanchions, railings, fairleads capstans etc etc
Hull - whether you paint the hull side or the deck first sides is not important as you will need to mask alternate areas whatever the order. Having said that I prefer to paint the sides first.
Glaze portholes and windows after airbrushing.
Use high quality masking tape - Tamiya (helps minimise leakage of paint under the mask and should not remove paint when the masking is subsequently removed).
If you get a run - just wait till dry, rub down and do it again, don't try and bodge it

Bear in mind you will always have to hand paint something (e.g. bridge decks in confined spaces with bulwark supporting brackets making masking impractical).
Just my thoughts
Robin
