We are going to do the ink thumb print thing. It will be in addition to the regular sign in. Most people do trees and the finger prints are leaves. Anywho, what ink do people suggest? I tried colorbox pigment and it just didnt look as good as i hoped. Its easy to get off your finger though. I tried memento and even though it looked good and dried fast the ink stained my finger for a day. Any other suggestions otherwise we'll use colorbox and hope for the best?