you could scratch it off but it will leave a mark.. The best thing for the factory look would of been a factory nav.. at the same time, factory cars come with many brands of radios. Like Bose, and others (cant think havent had coffee yet )
Im sure it looks factory if you did a good install..What I would do is get a small piece of black tape, cover it, print out a small factory label. and get some not so shiny clear tape, and put it right over the black tape over the logo..