Ryan,

Regarding the depth of your panel lines, I think that they seem rather deep indeed, which might be OK on the hull itself to give the effect of cladding or armor often seen on Sci-Fi spaceships, but for panels, most should not be recessed at all. You might want to delineate the panels with a double contour and have that narrow band recessed instead, leaving the panel itself flush with the hull. Unless the effect you want is more like an open bay.

Jean-Paul