I found something else out, in regards to the limit of 4 tattoos, and the tattoo quests.
One of my pirates tested out what happens if you already have a number of tattoos in your possession when you do the quests.
It awards them, I have one arm with 5 possible tattoos to select from, and another with 6! I have 2 pages to select from for each.
However I still cannot purchase any more, because I have more than 4 total. Also, it lets me "sell" my quested tattoos now, but gives me "0" for them.
I also noticed that it marked my special event (purchased) tattoos, as "quest" also (although I get gold back for them if i sell them). My Mothers Day tat's are all marked "quest" now.
A little off topic perhaps, but if you all want to keep the quested tattoos... buy all the purchaseable tattoos you can, before you quest.
