You have got some good inputs. I throw in my two cents and suggest you get some 5 % Lugols and paint the breasts daily or every other day for a while. On dry skin, different spots to avoid skin irritation. The areola and the nipples absorbs Iodine in minutes. I believe it is a good reason for it.
I painted the first year of Iodine to rid my self of FBD.
After that I did it monthly.
Now if I forget for a few months, my breast reminds me to paint by getting some tension again.