This is something I CNC cut from shitty 3mm Ali chewing gum ;-)
http://i135.photobucket.com/albums/q...ps555864c9.jpg
I used a 2 flute Aluminium specific cutter with air to clear the chips, run at the right speed it cuts lovely, run it a bit slow and it looks like you're ploughing the material rather than cutting it and leaves 'orrible rough edges