Just that really.
I have let my streak grow in over lockdown and and quite happy with it. However, I feel it doesn't look grey enough. My rest of my hair is brown, going salt n' pepper. The streak looks slightly off-white (not in a way I like!).
So, what would a silver shampoo do to the streak, and would it leave a growth line on the rest of my still mainly brown hair, or does it just wash out?
I've got some weddings coming up, and don't want to make a mess of things.