Thanks, Kweassa. I think the 3D aspect of the panel lines is overemphasized too, but wanted others opinions.
The panel lines were created by scanning a diagram from a book, the dark lines have a color overlay of x535353. The light lines are a duplicate of the dark lines, with a color overlay of xFFFFFF. Then I "nudged" this light panel line layer 1 px down, 1 px over (towards the tail).
I just can't seem to get the tight, narrow lines I want. I've tried changing the panel lines file to mode Duotone, and then use the sharpening filter, but it doesn't help much. Maybe I need a better scanner that can scan at higher resolution?
There's a problem too with the anti-glare color on the top of the fuselage deck, but I can't touch that color in the bmp file so I just tried to skin around it. Not sure how to handle it.
I'm a nearly a complete noob at this but learning a lot. I have no clue how Citabria's panel lines are so nice on the P-40. Does he redraw them from scratch using a drawing tool? I not sure I could ever get that quality from a scanner.
Anyway, still having fun and learning. Appreciate your help!