Hi.
I recently painted the same model.
here
First I primed in and out then sprayed the white inside whilst having the outside covered with tape. Did the white first as any stray paint is easier to cover than stray blue where it should be white.
After the white had been left for a few days I masked the entire interior, covering the window openings etc from the inside (just incase), and sprayed the blue.
Hope this helps.
Richie
here