I had a ford sticker on my moonroof and my wife put calvin flippin the bird on the back window the only difference is when its wet you can still see a little of where the sticker was but not a difference to the tint. I have a quality tint which holds up realy well, but my old car had a 3m job on it and if a bird **** on the window and you did not get it off that day you would see the spot where the sun faded the tint.