Mike -
Actually, it might!!! Gunship gray is still lighter than pencil lead. Remember the darker the paint the lighter (or less contrast) the panel lines will have. You might even be able to get artist pencils it varing shades. (They might be softer, but you could check.) Only way to know is to try. BTW - the penciling was done on the final (flat) color coat, not the clear gloss.
salty - As much cursing as I did while making the kit, I think it was a pretty good kit. Nice detail, pretty good fit, except for the intakes, which is pretty much a given. Also found that the plastic was a bit soft, and I had to repair a few parts before assembly. (Yes, I have 10 thunbs.) It's basically the C model with new intakes. I didn't bother hidding the air brake, just glued it shut. Pretty typical.
Raised panel lines may not be that much of a problem. The pencil trick works, just make sure you darken the same side on all, and position the finished model so that they look like shadows. Else, pre-paint the model black or drak grey, and then buff over the panel lines. You'll rub off the color coat and leave nice black lines. Weather as usual.
Archer out.