Actually, the "poke very small holes" method is called stippling or dot technique. It is the most difficult style to master. The "scribed in with a point" more accurately defines how the majority of scrimshaw is done and India ink the most common fill.
The best older books on scrimshaw are the "Scrimshaw Connection" series put out by, now deceased, Bob Engnath who spent many years making knives in CA after leaving WA state.