Weapon Skin

[x Mithrandir x.2691]

I got a weapon skin from Black Lion for a staff. 

If I use it on an Exotic staff can I use it also on another staff, or does it need to be removed first as is one-use only?

[RoseofGilead.8907]

The actual skin item is a one time use only item that basically acts as a free use of the skin (meaning it won't charge you a transmutation charge to use it that one time). Once you've used the skin, the appearance itself unlocks for your entire account to use as many times as you want. You'll just have to use a transmutation charge to apply the skin each time you use it.

And no, you don't have to remove anything to change to a different skin. You'll just go to your Wardrobe tab, click on the weapon you want to dress up, choose the skin you want to use, and then apply it.