What I mean by the title is would it be possible to rework the glamour system so that it detects whether you're glamouring job-specific gear or something and if it would let you glamour something else under that.

So like for example I could glamour the Warrior AF on my tank gear but then I could also glamour something like the High Allagan set on it, which would show up whenever I'm on DRK or PLD.

It seems plausible, as it is now the game already has two layers of gear when it's dealing with AF glamours (the AF and the regular, unglamoured gear) so adding another inbetween can't be that taxing.