It's not specific either. In other words, I'm getting this problem with both aftermarket and Hasegawa decals. The shark mouths were indeed bright white when put on but then started to yellow after coating. However, if you look carefully at the tail of the same Tomcat, you see that the decals are starting to "chip" and peel away. Really irritating.
This seems to be a "Tomcats only" problem. None of the other Hasegawa decals give me any grief or hard times. Any ideas?