[PCT17522]

I use Tiger powder often. I do notice that it flows more so than other powders (like Morton) that we use. I can't say that i've ever experienced "runs" or even drips or stalactites unless i was spraying the part hot and getting carried away. The temperature that you're using sounds correct, however most Tiger materials that we use specify 392 for 10 minutes. Try the two coat method, i don't know that it will work...Both coats will not floww into each other for a smooth finish and you will have to address the faraday effect with one of them.
On another note: I've found that hot spraying at an elevated temperature helps. I preheat for hot spray at about 500 to 550 degrees (using the same powders that recommend 392 or 400). The elevated temperature forces the stages of the cure to happen faster and the powder goes through the flow stage without as much of a chance to run or drip. You can achieve a much thicker coating without worrying about all the drips, runs, or orange-peel that would occur with a cold spray.