I've come close (on Scotch-brite pad burnished steel) by applying a couple coats of cold 'browning' solution (lightly heating the metal with a propane torch while it is wet with the solution).  I wipe the metal, between coats, with a wet rag.  The cold brown may leave the metal a copper color.  I then apply coats of cold 'blue' over the area that has been 'browned', heating, then wiping with a wet rag.  Finish with water rinse and oil.