Not sure about the wax temp. But it wasn't under a constant flame; it sat in a warm water bath while I dipped the bottles.
punatic, I used Lalvin D-47. OG was 1.104; FG was .999-1.000. I could be tasting ethanol. Honestly, I've never evaluated a homebrewed product with that level of alcohol, so maybe I'm just tasting normal ethanol amounts. But it's pretty hot tasting; a few other tasters (who are primarily wine drinkers) make the "whiskey" face when tasting it (as if to say, "wow, that's got a lot of alcohol!").