Hi! My friend and I love to change our hairstyles and color.. a lot! I am a natural dark blonde and have recently gone DARK brown. NOt quite black, but definitely not natural dark brown. Then I decide I wanted some blonde hi lights. NOw Im thinking about going back to my natural (maybe a shade or two lighter than my roots) LIke a honey color blonde. Will the Loreal Color Zap work on my 2 toned hair? Will it take away the blonde and the dark brown? Also, DO I color immediately AFTER I use the Color Zap, as in same day? :) Thanks for your help in advance!