Hi, I haven’t a lot of experience in doing balayage and have a client requesting it. I shall be doing it with foil, weave and tease technique however I dont feel confident in that I shall have a lovely blend into her natural. I never know how much to backcomb, I imagine the more there is the better the blend. To be safe from this would you recommend a shadow root of her natural to help cover up any lines? Is this generally a standard thing that is done? To creat a softer blend of colours.