Aww, what awful timing for a hair catastrophe! If you can't cover the spots, you can probably just color your whole head- maybe start over? I don't know, I am a huge chicken and wont touch my own head with chemicals. I'm sure your hair dresser could work it out. Daisy Mae is a hair dresser- maybe she could offer some tips. Good luck!
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"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226