This is what paint shops use, 3M 08984 General Purpose Adhesive Cleaner. I have used it for years and it has never hurt the paint, used wd40 once and it softened the paint and some came off, never again.
On the way to get the 3M product
My body shop friends said that I have patronized them enough to borrow what I need with no repayment cost--
thanks again
My buddy owned a body shop for years. He told me that whenever you remove a sticker/decal from a vehicle you should always apply a thin coat of wax to the area. I used the wax that comes in a spray bottle. That said I also used the 3M stuff to remove stickers/decals.