I've heard bee spit will work too if you can collect enough bees and get them all to spit in a glass. Oh, wait, that's what wax is. Stool wax ring, candle, or other purchased wax I would think is all the same. Stool wax ring maybe gonna have something additional in it to make it softer. Also some candles are being made from soybean oil. Is this a case where wax is wax is wax. Keep on postin' guys, I'm still learnin'.
p.s. I have used old candles for many years, but since I now cast in the boss' garage, she don't care for the smoke it makes sometimes before the fire gets lit, so I went to Buck Beaver flux that I also learned about on here or maybe the high road.