I pored through the Wiki, looking for instructions on how to use a barber's hone, but I could not find anything.

I saw one used in a movie (the Great Dictator), but I don't want to risk ruining my razor or stone because some Hollywood guy didn't do the right thing...

Is it similar to a regular hone? Do you use oil on it or water? Do you lap it similarly to a waterstone?

TIA