Raised panel lines

I run a very sharp pencil tip along one side.

Some say to pre-shade the panel lines black, then after the camo is sprayed on, take a fine sanding stick and lightly sand the tops of the raised lines, exposing the black paint. Would take a careful hand I would think...I would say just subtly post-shade the panel lines with a darker base color. 

I experimented when building my Monogram F-84F by painting the underside black and doing the lightly sanding thing on the raised details.  I sort of rushed through it but the effect was not too bad:

Hi, Theres a good article in the issue FineScale Modeler special issue "Build Better Models 2" page 58. Holiday 2014 Hope it helps.

OldSalty

I have read that you should basecoat black, spray future acrylic, then the final color. After that, you should sand away the final coat from the panel lines. The acrylic is a harder coat that protects the black from being sanded through.