hi guys, i have a lady coming to me next week she has been having pink and whites at another salon. Ive been practising my pink and whites and now feel able to tackle this just one question. She says they are very thick and getting thicker everytime they are rebalanced. When you rebalance p&w do you need to file the product down more than you would if you were using one colour? or do i feel the white area more than the rest?