Liquid K, sauna, and stop walking around shirtless! Seriously, you want to remain in a sweat like condition throughout the day, so add layers of clothing. You may also want to hit up a senior citizen and get one or 2 of their Lasix, take this 12-24 hours before your shoot. Of coarse Aspirin, Caffeine, and Ephedrine pills 2 times a day is usually effective. This is how I did it back when I competed. Be careful on the lasix, it can lead to heart failure and other organ failure if you dehydrate too quickly or squeeze out too much water and sodium.
You doing a spread for Instinct Magazine? HotSpots Magazine?