eeb, and Buckeye,
Johnson's baby oil is, I believe nothing more than parrafin oil which is exactly what rubbing oil is.
Napier rubbing oil does not contain any abrasives.
Napier London stock finishing kit, I believe is brewed up by Ronnie Rustin of Rustin's Paints London.Napier's original recipe was off Frank Wyman gunsmith this was basically BLO & Turpentine. I think it may be true to say that I am one of the very few finishers that continues to research and experiment.Most have their favourite and keep it a closely guarded secret.