Advice Needed

When painting a car black, do you still outline the windows and doors with flat black paint, or should it just be left gloss black? One other question, if I outline the panel lines with my Gundam marker will it show up?

yeah i would outline the window frames with flat black, the flat black does look really different to the gloss of the body and the car will look unfinished otherwise. Wouldnt bother outlining the panel lines though, but maybe try on some ou of sight panel and then decide.