Uh- Why would anyone put decals/stickers on non factory tinted windows?
That said, you should not scrape. Chemicals might work. 3m makes an adhesive remover that also might work. Heat might work as well to at least get most of top layer of the decal/sticker off. Glue residue might remain.
Best answer might be to take it to a tinting specialist for advice.
That said, you should not scrape. Chemicals might work. 3m makes an adhesive remover that also might work. Heat might work as well to at least get most of top layer of the decal/sticker off. Glue residue might remain.
Best answer might be to take it to a tinting specialist for advice.