This a recurring suggestion and a popular request. Here are some (but far from all) of the forum threads about it:
- Necesary skin implement
- Custom transmog for weapons and/or armor
- Please, let me hide my helmet - or let me cast a potion/spell that creates an illusion of a different armor
- An old but ongoin issue - armour stats destroy role-playing
- Adding Weapon and Armor Transmogging
- Weapon Skins/Armor Skins (Fashionist Mod?)
- Changing Armor Appearance/Type
Long story short, they said repeatedly it ain’t gonna happen. They might end up changing their minds, but I wouldn’t hold my breath.