Android App that spoofs Bluetooth or Wifi MAC addresses

I need to make a proof of concept application that will change my MAC address of the bluetooth and wifi radios at the press of a button. This will require low-level inseparability with the device. My device is a Samsung Galaxy S3. This is a proof of concept to see if it can be done. If successful we will turn it into a full fledged application. It does not need to go into the store, it can just run as a APK installed locally.