Factory installed, yes.... the factory very rarely put any paint on the roof, primer and some overspray of color, which you still see some restorers doing because they don't want to waste the paint, It's only a matter of time before moisture gets under the vinyl and eventually the primer, most think a vinyl roof "seals off" the roof from the elements, not so....

when I paint a vinyl top car, the roof gets the same coverage of paint as the body regardless of paint type or costs