 Armstrong’s work has also appeared in publications such as "Vogue Paris", "L'Uomo Vogue", "Arena Homme +", "GQ", "Self Service", "Another Man" and "Japanese Vogue" and he has worked on the advertising campaigns of companies such as Zegna, René Lezard, Kenneth Cole, Burberry, Puma, and Barbara Bui.He once shot editorials for "Wonderland", "Vogue Hommes" and "Purple".Although his primary subjects include portraits of young boys and men, Armstrong also released a book of land and cityscapes in 2002, entitled "All Day, Every Day."