This is a remake of my other badge here http://www.thingiverse.com/thing:34807
This one is higher resolution and has a hole or round inset in the back for a 3/8" magnet. This allows it to be a fridge magnet or use another magnet under a shirt to attach to clothes.
For best results use a .35mm nozzle or smaller. I got best results with a .15mm layer height and printed very slow 10mm-20mm second.
I did fill a few pinholes in the silver part with ABS/acetone solution and then lightly sanded it before painting. Glue a magnet in the back you are ready for service.