I was wondering if anyone had any advice re: colour glossing. Am a mid brown colour and greys are getting much more noticeable in the front of my hair (in fringe and at sides). My hairdresser has suggested that I get a half head of colour gloss instead of a permanent colour as it will fade as opposed to leaving a line. Does anyone have experience of this? My hair is quite messy wavy, which I like. Will it straighten out my beloved kinks?