Get tape off tint?

That being said…if it does go bad…how much to pull off old tint and replace with say, 40%? Just the front windshield.

Also, how do you personally go about the registration stickers? I currently have a cutout for them which looks goofy to some (I’ve gotten used to it), but have been stopped a few times and the officers that stopped me either didn’t care or didn’t notice the OBVIOUS difference in glass ‘color’ where the stickers are and the surrounding area.