ive got about eight stickers on my back tinted window, all of them are placed on the outside and havent affected the tint any, also, to replace them doesnt take a huge amount of effort either. The only ones that I have that go on the inside or those static cling ones, which suck anyway (they just dont stay put) Watch out you dont put stickers where windows may slide over it, i have a split window and i put one on once and then i had a heck of a time getting it to open and close, eventually, the sticker just tore.