->It's no different than painting pin-up girls on on your B-17. Yup, my first thought. Then I started googling and found this about how apparently writing on w

->It's no different than painting pin-up girls on on your B-17. Yup, my first thought. Then I started googling and found this about how apparently writing on weaponry seems to be an ancient practice. http://www.britishmuseum.org/research/collection_online/collection_object_details.aspx?objectId=399876&partId=1&searchText=sling+bullet+inscription&page=1 http://www.britishmuseum.org/research/collection_online/coll... Relevant reddit thread: https://www.reddit.com/r/AskHistorians/comments/1lmzov/is_there_a_history_of_soldiers_writing_messages/ https://www.reddit.com/r/AskHistorians/comments/1lmzov/is_th...