I did this debunk (see pic above) about 3 years ago but still the they insist on making a mystery of it.
Shrug.
A little ol’ Southern Lady can show y’all how it’s done.
Have a blessed day :o)
P.S. A true Renaissance artist would refine the technique but a bit of Portland Cee-may’nt, sand and water and some fine, fine material is all it takes.
Jeebs. ‘Snot difficult!