Do you have the Verlinden ejection seats? I've done several of those for F-4 Phantoms and F-14 Tomcats. Verlinden includes basic instructions.
I'd start by spraying the entire seat in a very dark grey, such as gunship grey (FS36118) or Euro I grey, or German grey, etc, and letting that dry/cure for a couple of days. I then brush paint the seat cushions, the headrests, then the seat belts, and next the smaller details such as the oxygen bottles, actuating rods, etc. I usually use Testors Model Masters for all these steps.
When you're mostly finished with that, make a black "wash" w/ water based acrylic paint, such as Tamiya or Testors MM Acryl, about 1 part paint to 6 to 8 parts thinning agent (water, isopropyl alcohol, Windex), and paint the frame of the seat with this. Come back with a Q-tip dipped in thinning agent and "rub out" the wash in the biggest areas of the seat framing. The black wash will remain near the ribs and spars, and this will give more depth to the seat. I then finish with a slight drybrushing of silver to simulate worn or chipped paint.
Hope this helps. If anyone has a better method, or finds a fault in mine, speak up, I'd like to improve, too.
Mitch
On Bench: AM P-51B, Tamiya 1/48 F4U-1A
On Deck: Hasegawa F-14's (too many); Tamiya P-47D; Academy P-47N;