Charming!! You had some great ideas in there and I love the "foxing" idea!! Sometimes mistakes make our greatest creations!
I use the static pad as well and after I've sprinkled the embossing powder on and tipped it back off. I stand the paper straight up and down and give it a good snap with my fingers. That tends to get most of those pesky flakes off and is quick and easy.
I know when I brush the sprinkles off, I have accidently gotten into my image and then either ruin that or, resprinkle on more embossing powder!!
Good luck. And remember, you are your own worst critic!!