Good luck with your experimentation!
I feel you on the gray roots thing
Henna's nice but man, it's true ... these henna mixes sure are a commitment for our grays. You know at this point I have no shame. I just wait until I have several inches of gray roots, then
I henna. You're lucky w/that top front gray area. My hair is now salt-pepper in several areas of my head. One day I'll finally give in and embrace silver. But right now I'm waiting for I don't know what ... maybe waiting until I'm finally less vain