airbrushing fuselage techniques...

yeah, I know the questions don't stop! I've got "mini me" (compressor) all set up, and am now in the final stages for my debut. I've been working on a hasegawa 1/48 which will be first "victim" to be subjected to my airbrushing torture.

Anyhow, I have the fuselage pieces unassembled, and am clueless as to wether to glue them together and airbrush the whole thing, or do both parts as a separate project and then glue them afterwards. My main concern is that if I do it as both separate pieces, when I glue them, the "seam" will be noticeable as opposed to maybe doing the thing in one shot. (although it will be bigger and more difficult to do i assume...)

I'm confused...