It'll eventually wear off your skin. In a few days. On other, relatively non porous surfaces, it can be removed easily once cured. Porous surfaces like wood, cloth, or carpet? Sorry, it's here to stay.
This is excellent advice actually! My first instinct after getting it on my skin was to wash it off with soap and water, and learned afterwards that water causes it to cure faster. So it would make sense to dampen the wood to get it to stick better