The film industry norm for fake tattoos that we use are Pros-Aide tattoo transfers. Very easy, very fast, (all you need is water to apply them, no chemicals, so they are very safe on the actors) very easy to touch-up and they last about 5 days, great for continuity. Haven't used the Tinsly Transfers, but from what I've seen and read, it does sound similar, application wise. On Mortal Instruments: City of Bones, we used thousands of Pros-aide tattoo transfers on about 200 actors/stunts/extras. Most were topless and we had to do entire upper bodies (necks, fronts, backs, and sleeves) and all were continuity for the 56 day shoot. For the branding scars, we used the same Pros-Aide transfers as well. That may sound like a lot, but in reality, it took only about 15-20 min to apply 15 extra large tattoos per person. For touch-ups, all we used was the black/white pigments In the F/X Skin Illustrator palettes to get that dull grey look to them, especially in the neck and inside arm areas. Ours were made in-house by our prosthetic guy in his shop, since they were custom designed tatts. To make them, all you need is water slide transfer paper, Pros-Aide, water, no colour or translucent powder, towel, powder brush, computer with photoshop or other similar graphics software, and a laser printer. A regular ink type printer won't work. Just create your design on the computer, laser print them onto the water slide paper, add a very thin and very even layer of Pros-Aide to the transfer paper, let dry. To apply, do as you would a Tinsly Transfer.