Special thanks to the Estes Valley Fire Protection District for assisting me with temperature testing some different samples of fatwood\pitchwood for an upcoming article I'm working on. I still have more research and testing to do, but I can say at this point that fatwood burns hotter than both Trioxane and Petroleum Jelly soaked cotton balls. We also saw the highest consistent temperatures from a piece of solid Douglas Fir resin. Here's a shot of the fire captain testing a burn sample with an infrared heat camera:
Cool shot of the infrared camera during testing: