As much as this sujestion to add to your idea OP can get... exploitable... u could have it so any "Base" gear (IE: gear that doesn't have a glamour cast apon it) that gets put in the Armoir gives the player 1 copy of the dye back

I say "Exploitable" cause then gear would get sold way higher than others on MB just cause it comes with a free rare, possible Mog-store, dye that you then get to use... granted I personally see it as a small CON for the high.many PRO's it may give.