yes it can be budded more than once I forget what it is called but basically you pick 3/4s of the buds or something like that and then put it back into vegitation for another month. Basically you start the whole process over but every time you do it your plant will produce less buds then the time before. It is really only worth doing it once twice at the most. I read a thread about this somewhere on this site...
it is called regenerating. doing it right now to a Brain Damage. one more week and she goes to 12/12. been under 18/6 for 4 weeks and good growth so far. good luck, give it a try.