Tampo / Stickers - Tampos are the pad printed paint designs, which were used on a couple of early models. These are sometimes worn or smeared.  A number of the castings came with factory applied stickers or decals.  Missing or worn decals can affect certain cars such as the Spoilers series.  Grand Prix cars came with decal sheets and really have no affect on the value of a casting unless they are properly applied or misapplied.