Some companies do it better than others, but generally speaking, It looks, ridiculous.
Me, i don't have any gray areas per se, but i will, and at that point i'm either ODing on anti graying pills, or just man up and shave It off.
UNLESS, you're black, or hispanic or what have you, and have that perfectly jet black hair, just don't.
Beard hair especially, in NOT of solid tint.
Ok so, i have light-ish chestnut hair, and beard, there's pseudo gold flecks, auburn flecks, and softer brown flecks, what am i gonna do paint a PICASSO every other day in the mirror.
Christ.