Thanks my friend @uscusn!
Indeed the shallow intake is a major drawback of many older mold Falcon models (yes, even 1/48s, not as shallow as here, but, still, evident...Yes, flat black will the rear wall be painted, attempting to somehow provide a sense of more depth.
Here is the "intermediate tone" gray applied, at the top front, a tad at the sides of the intake (as used to be the norm back in 1991, not sure if they do it nowadays, the intake color looks uniform...), the strakes' outer surface and fin. One more area should be done, the vertical sides aft of the wing, then onto the underside lightest gray (talk about braking the lighter towards darker modeling painting rules!)
Thanks for stopping by!