Advise would be appreciated please . I have a client who has been having 7.40 majirel I have been putting some base 7 in for the roots as she is about 30 - 40% grey and using a Demi for her ends , it's a lovely colour but she has decided that she wants to back to her full head blonde foils . I have told her that it wouldn't be possible in one appointment to get her back to her former colour . I will be doing a strand test but was thinking if I could lift enough without compromising her hair With lots of fine weaves and tone ? Or would it be better use a colour remover and then foil thank you xx