When decals come off?

Hey, if you take a decal off a car after it's been on for a few years, can you tell were the decal was (because of a sight color difference say because the part underneath is covered for a long time while the rest is exposed to the elements)? Thanks! :frog:

Never had to do this myself, but if you take good care of your car (waxing, washing, basic maintenence), then you probably won't see much of a difference. If you don't do those things, and the car sits out in the sun alot, I imagine that you could tell a significant difference.