I just have to say something about heating the engine in the oven. You may have read that wrong?? Perhaps not but usually we use the oven or a heat gun to heat up the engine so the old hardened Castor oil softens up when you have an old engine that is frozen up and won't turn at all. The glow fuel you asked about is just alcohol, nitro and a blend of oil and usually in that blend is Castor oil that will harden and gum up an engine that is stored over time. Heat softens up the old oil and when you can turn it over then the engine is usually flushed out and cleaned.
We have some members here from Alaska and mid west and east coast where it tends to freeze a lot. During the winter one of there start up tricks is to warm up the engines first. Some use the cars heater and some do as mentioned with the cars exhaust. They don't have to be hot, just warmed up. Here in Vegas it only gets into the low and mid 20 during the winter, the engines don't like to fire right up when cold like that so the first start of the day is the hardest, after that there is no problem.