I too have been wondering this as well. It seems to me that I once saw a picture of a sailor of the period or slightly later that had sailed in Polynesia and had the traditional facial and leg tats of the Polynesian warriors, ie., the smack comb tats, similar to : http://www.mooreatattoo.com/ , just not as elaborate. I can't recall where I saw this, I think it was on NPR several years ago, so I can't say for sure the time period, but I was thinking of doing some temporary facial tats in this manner for myself, or look into possible Indian Tattooing, as I wear the Buffalo "jesus sandals" and have incorporated an India voyage into my character.
Great subject!