Answer:
A skin have I, more eyes than one. I can be very nice when I am done.
Dies half its life. Lives the rest. Dances without music. Breathes without breath.
What relies on columns but isn't a house, and asks for help but can't speak itself?
This only turns over once you have travelled very far. What is it?
Salty water everywhere but not sea in sight.
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?