Hi I have a client who I previously coloured about 3 months ago with bleached foils on the top and half 5/0 + half 5/07 with 6% put through the rest of the hair. She has a short layered style with about 50% grey. She now has a few bleached highlights on the ends but wants her base colour darker with mahogany foils ( thinking 55/55) Question is I usually put the foils in first but I am worried about the bleach on the ends.I am thinking of taking the base shade slightly darker maybe half base 4, half base 5 with some warmth. Would you apply the tint all over first then add the foils afterwards. Also how much would the 55/55 show on the tinted hair and what volume peroxide would you use.Thanks in advance