I too wondered if it's real. Hard to see but I imagine a drip or two of instantly cooled wax on the nut/stud. If the metal is not warm enough to keep the wax melted how can it wick in between the threads?
I've used the paraffin trick on stubborn fasteners using an acetylene torch, pretty much the hotter the better and add the wax as it cools to a point it won't all catch on fire, which is still "smokin hot".
