Hi, i have a new client that wants a perm, i haven't done one for many years!! She told me that she has not coloured her hair for over a year and has grown it all out but since then she has had a perm, approx 6-8 months ago and it is now only on ends, should i therefor use a solution for natural hair or one for coloured hair in case there is some left on the ends i cant see? She has it trimmed regularily.