If the sticker or decal that is on the visor is an easy peel vinyl, it should remove easily, but if it's a standard adhesive, it can be difficult to remove.
In this case, what you'd need to do is get a hair dryer and heat the decal up enough that it is quite warm - but not hot - to the touch. Once this is done, get a fingernail under one edge of the decal and slowly pull it off. Hopefully it won't leave any adhesive behind.
If it does leave some adhesive behind, you can get "orange peel" glue removers from the hardware store or possibly a larger grocery store as well. Apply to a soft paper or cloth towel, then dab on the glue until it softens, then rub it until it comes off. Clean the remaining residue with a dry corner of the towel. This type of glue remover works well on most plastics I've used without dulling or clouding the finish of the plastic.
How to Remove a Large Stickers Off the Rear Window of Cars
Not that we're aware of. In reality, the decal itself will protect your vehicle's rear window quite well. And if you understand how glue works, you won't need to worry about getting the decal back off.
Of course, now I'm going to tell you how to get window decals off your car windows or bumpers the easy way. Well, sort of easy.
Most window stickers of the exterior application variety will be printed on vinyl sticker material or polyester decal material. The glue typically used is an acrylic adhesive, which, over time, becomes hardened and more difficult to remove. If you're purchasing wholesale decals for resale, it might be wise to look into removable glue decal materials which are becoming popular for this reason.
But no mind. In your case you've already purchased a large sticker for the back window of your car, and you're nervous about damaging the window, either during the application or removal of the decal later. In neither case do you need to worry about the window.
Removing the Decal Off Your Car
When it comes time to remove the decal from your car or truck, get a heat gun or a hair dryer to warm up the decal. If you're using a heat gun, the lowest heat setting should do the trick. If you are using a hair dryer, you'll likely need to use the highest heat setting.
With large stickers, you may need to heat a small section of the decal and work it off a section at a time, especially if it's been on the rig for an extended period of time. Once you've heated a small area (100 square inches or so), begin to peel the vinyl with a slow but steady pulling motion at around a 45 degree angle.
As you get to the end of the heated window/vinyl, you'll feel it become more difficult to remove the vinyl. Stop and heat another section of vinyl/glass, and repeat.
Removing the Adhesive Residue
When you have the entire decal removed, you may find that there is some glue residue remaining on the glass. You'll need a good "orange peel" oil glue remover, available at many hardware stores, to apply with a spray bottle or a soft towel or soft paper towel to the glue. Allow the glue remover a couple minutes to soften the glue. You may want to apply a second application of the glue remover to the residual glue to further soften it, especially if the decals have been on your car for more than a year.
Once you've softened the glue sufficiently, you can take a glue remover soaked towel and gently rub the areas where the glue is remaining. Once you can visually observe that the glue is gone, take a dry, soft towel and wipe the window again to remove the glue remover residue. If you need to apply graphics immediately, you can use isopropyl alcohol to neutralize the glue remover, or if the decal was on a painted surface on your car or truck, warm soapy water may be preferable to alcohol, which could potentially dull your car's finish.
There are static cling window stickers and decals that make use of removable adhesives. You can easily remove them when and if you want to. Go here to get to know these printed graphics.
ABOUT THE AUTHOR
Barry K. Brown has been in the Sign, Banner, Decal and Display Business for over 20 years. It isn't what he thought he'd do with his life, but he says he knows too much now to do anything else! He has been marketing these products online since 1998, and the company he was general manager of in 1998 was the first sign company to be listed on Yahoo!
He invites you to visit and like his Facebook page online at Visigaph Profile to view most of his shared postings.