I did a couple of mac patterns like that, I got the first 2 ho'ed right outta my hand by a certain painter/fisherman, and he mentioned something about Japanese art, even was mentioning some artists name, and technique!
.....
I asked him if whatever he said was Japanese for "Aluminum Foil Stencil"
I like the look, kinda different,... Larry, ever do the freehand with the sharpie, or fine paint brush????