There are very few activities that are fully reversible.
Ice sculpture might be one of them. Once the ice melts, all the effort and information is lost, and refreezing lets you begin again with a new, fresh block of ice.
Of course, it’s not completely gone. The thing you made remains in your memory, and in the consciousness of anyone your artistry touched.
Yes, we leave a trail. Always.
Tread lightly, but make a difference.