So, I am getting my new model body ready to paint. I will be doing the interior in black. So, when do you guys paint the headliner and the inside widow pillars, and the windshield and back glass pillars, as they should be black to match the headliner. Watching YouTube videos, I always see everyone just painting the exterior of the body and nothing is done to the interior. And do you airbrush or brush paint it. And if airbrushing, how would one go about masking, as I would think I would not want black paint to come out and get on the exterior.