Guild Wars 2

I’m not sure how the skin works, does it work like transmutation stone?

If I buy the skin at level 5 and put it on my current armor, can I apply the armor skin again to different armor?

I hope its not the one time use, or I will have to wait till I hit 80.

You apply it to your armour as if you were using a transmutation stone.

After you apply it to your current armour, to apply it to a different armour you will need to use transmutation stones.