David Box said:Heat the steel at least until it will make an oily rag smoke and wipe it down with the oily rag or dip it in oil. Start out on scrap. It's not hard.
Stumblin Wolf said:Might be a dumb question, but why would you want it black? After forging its pretty black and scaly so I take some mean wire brushes to it to get it down to shiny (silver/gray)then coat with linseed oil/beeswax/turpentine mix which darkens it up somewhat for dubious rust prevention. Scaly black is not a good finish.