I am using 4625 Complete Pillar wax. I have made quite a few pillars, and never seen this before, but this was my first 3 wick. I have seen a couple of times in my votives, where I mix the wax usually 75% 4625 and 25% 4786. I will do a search for fingernailing, thank you. I din't know what to call it, lol. I showed it to my cousin last week when she came over, and she loved it, so she bought off me, lol. I told her to make sure she lets me know how it burns.