In lockdown a client bleached her hair with lightener and 40vol. She then dyed it dark brown. Its around a 5 now with a lot of warmth in some places and has taken differently in other places. She is naturally a base 7. Now she wants to go blonde again. She has booked in for April. When I can see her I will take a cutting to test the hair. I have suggested hi lites moving forward and explained it will be a slow process. How long should she wait until I can put in the hi lites or is this not a good option? Advice is very much needed.