This came out so much better than I could have hoped, it almost has a wood grain and would equally nice as a headbadge or a ulock-badge (fits most kryptonite mini models).
Made this for a secret Santa present for a friend. It was fun to make, and goes along with the acorn head badge her boyfriend got me to make for her.
Its copper with a brass squirrel with a little splash of liver of sulfur on there to give it a nice look.