I seriously had a good laugh looking over some vids where folks prank their friends and masks look quite convincing, when depicting elderly folks I suppose, at least on the videos they do. But such would be a cup-out and may slow the transition process and strive and energy to get to the holy grail of transition, womanhood full on.
I am a member of another forum and there are couple girls there who believe that they could never pass, so they wear vinyl suits and masks. But everyone should believe that passability is achievable despite the age factor, also that to become absolutely passable at older age, FFS will be necessary, together with HRT and some time.