to do that you would have to live a a lab and be studied 24hours a day.
yes you can but its hard work and slow. you may be better off doing it in one hit. Take 2months off weight training and diet well and do lots of high intensity cardio.
or you can just carry on as you are but add more cardio. if you choose the slow way without loose muscle you have to eat and train the same way, just add lots of caridio everyday