Not true. I did the RCU review on the Hanger 9 P-40 and there are 2 different types of "decals" on this plane. The ones that come pre-installed on the plane are made out of Ultracoat, but there is also a seperate sheet of "stickers" that come with the plane and are applied by the modeler. These are made out of a clear plastic and will not shrink with the covering material. If it's these decals you are having problems with you will need to remove them in order to tighten the covering underneath.

Ken