Tbh instead of having to do the template before and after I would have at the beginning of the episode gotten the reader to pick the natural colour for the younger MC and created a whole new character for it using the “becomes” command.
That way you only have to worry about customizing your young self rather than changing it twice for the MC. But as others have said, asking Dara for a natural lip only template will be useful for this. But doing it this way only requires you to use the template once instead of twice.
E.g.
@YOUNG MC becomes MC
Then use the @YOUNG MC changes hair into (for example), command to change features to make her look younger like face shape.
Then all you have to do is get the reader to choose the natural lip colour for the YOUNG MC at the start of the episode and it wont change the MC.
If that makes sense - I know you already marked a solution, but thought this might be more straight forward.