Ok, this may sound like a stupid question to the more educated members of this board, but I wanna turn my buds a pretty purple colour just for the fun of it. If I chuck 'em in the freezer for a couple of hours, overnight even, will this do it? And if so, will it kill the potency? Please note that they have already been picked and all, it's not like I'm throwin' a growin plant in there. Just curious. Any answers shall be appreciated.