Originally Posted by Inner10
You could try whipping some air into the must and let it sit and hopefully some of the preservatives would evaporate. Once the carbonation has dissipated check the gravity and add sugar to your desired alcohol content. Then ferment, stabilize, back-sweeten and force carb.
I don't know that your plan to turn orange soda hard will work, but this does sound like the best method for an attempt.
I would recommend using EC1118, it is a very hardy yeast, and make a yeast starter, much like i do when making Skeeter Pee..