What a cool ID! Like lufbery said, it depends on what you are trying to achieve. Reference material would be your best help.
But, the main reason to "highlight" any area of a plane is just to show some difference in the panels, due to weathering or fading of the paint. Believe me, it can be overdone. Maybe start small, possibly by outlining the panel lines with black paint before you paint the overall color, and see how you like that.
good luck!