I don't think steam and a razor will work. I've tried that method to remove just the adhesive from sticker off of tint and it didn't work + I began causing scratches on my test spot.
I take it that's a customers vehicle? My best guess is you'll be best equipped with some Rapid Remover and a plastic razor blade. A metal razor blade might cut right through the tint, I'm pretty sure it would.
plastic blade and a sticker and label remover that the AG does not sell that rhymes with Girdle Fax. It works better than Goo GOne or anything else I have tried.
Maybe this and plastic razor blade. I don't mean to offend for AG does carry 3M Adhesive Remover. Definitely go the plastic blade or even one of those plastic wedges that come with stone-type bakeware.
If it’s stock the glass is usually tinted and it’s not a film added to the clear glass. I think treating it as normal glass is ok but I can’t guarantee.