Here's a post I did earlier....
Do you have access to the February 2003 Fine Scale Modeler magazine? There is a very good article in there about painting and weathering an F-14. When these aircraft go out to sea they look pretty clean. By the time they get back they look like hell. Crews are constantly fighting corrosion at sea. They repaint around panel edges, whole panels, etc. Pick up a good reference book on the F-14 that shows a lot of detail and examples of weathered aircraft. Try and duplicate as much of this as you can. If you know of any panels that would get a lot of attention from ground crews spend some extra time with them.
The other thing I would do is invest in some good after market parts to give your airplane detail. With the Tomcat a good cockpit set will probably do fine. Consider using Bare Metal Foil for the leading edges of the wings and gun port. Stuff like that. I spend more time and money on scratch building detail and adding after market parts than anything else.
Last put it in a case and consider a diorama base for display. I started doing this with all my projects. They look as good now as the day I finished them. Not all covered with dust and such.
I have an F-14 kit in the workshop that I haven't started yet. But this is what I'm planning on doing with mine. Good luck!