Is there any use case for this item?
Players can overwrite one enhancement with another.
In game UI also has Chance: 20% which means it will take on average 5 volatile rums and 10 silk cloth ( about 1 gold in total ) to remove 1 enhancement.
You cannot click off temporary weapon enhancements - This is mainly a relic of when windfury totem still applied a weapon enhancement, which would fail to be applied if you already had a poison or sharpening stone applied.