Don't you hate it when you have extra gloves or cauldrons that you want placed near you main tower but no towers with free slots!? Worry not, Mr. Iron can add them to his Armor and become the ultimate support! Don't forget to add those keys as well.
Funny thing to try is giving him 5 paintings lol.
Sometimes you just make me laugh.. =D too bad that 5 paintings screwed up my Mr. Iron. lol