To blend my skunk stripe, I kept a general rinse that you paint on the demarcation to sort of color the stripe and blend it with the hair until you've grown out the color. That worked very well, along with regular trimming of the old, colored hair. I have layered hair past shoulder length, so the layers sort of helped to blend it all and not be so noticeable.
I was very happy the day I no longer needed to use that grey hiding rinse at the roots and could just let it all hang out. My boys made fun of me for awhile...I think they didn't want to see this very visible sign of my aging. Finally, one day, my middle son was sitting out in the yard with me, basking in the sun and balmy breeze, and he said: "Mom, I'm really glad you let your hair go grey..it's really pretty in the sun."
You could have knocked me over with a feather! One, boys just don't notice much in the first place when it comes to their mothers or their appearance, other than to tease them. Second, that he would notice and then think it was pretty...that was major. I've never heard him call things "pretty"..either before or since, so that was quite the day for me. Did my heart good!