waaay off topic but not adult, yet. Window lickers was/is a term used for the prisoners who were on Thorazine and such heavy drugs. A very sad thing to see humans that doped up really, even though they would be very violent off of it.
anyway, back on topic
I've not seen a mention of proper preparation!! Preparation should be foremost in a person's thoughts, as that is the precursor for a good burnish no matter what solution is used. Good, sharp edge tools, decent sanding, and a little water make for a darn good burnish if you ask me. It's all in the prep work, and the elbow grease is cheap.