Urinating on skin

Is it true that if one pees on his or her hands, it will toughen the skin? After recently shredding my hands due to an incurable addiction to rock climbing, it’s an intriguing if gross prospect. Is this true? Why?

http://slate.msn.com/id/2100652/

I swear I only opened this up because I read the title as “Urinating on Sin.”

The reality was a mortal disappointment.

I thought it had something to do with jellyfish stings and urine as a cure. I’ve always wondered about that.