I installed my 3 black needle in my Patriot and used X1 black to pre-shade the panel lines. I should have got them a lot darker because once I put on that silver they just disappeared. The hard part for me is getting the paint viscosity just right so that you can get down to the detail lines instead of putting down a half inch wide black line that suddenly blurbs out of your airbrush. I also have to work on holding the work right along with a steady grip on the airbrush so you can get straight lines instead of old man wandering lines.