you dont say if you cleared the tails and headlights, if you want a shinny look, clear them with 3 or 4 coats of clear coat, when dry, wet sand them and buff them with compound. if you want and like the matte finish, leave it be, its your car do as you like.
they did come out nice and smooth looking, just a bit dull for my likes. i like them to shine like a painted surface.