I rigged one here last year and had some trouble with it. I used 1.5" mesh and it was WAY too big. Everything got hung up....keels, bills, eye bolts....etc.
I hope to make a new one using a fine mesh seine net this time. I like the idea of the triangle.
As far as painting it gold, I think the baiting language says something along the lines of "lure and enticement" meaning it doesn't have to be food to be illegal. It's not worth it anyway, in my experience, it's the food the ducks are after and once they've eaten it the game is over. Believe it or not, I've heard that many ducks use their sense of smell to find sub aquatic foods, especially corn and milo.
-D