What would happen if I dyed my a streak in my hair using facial hair bleach?

i think facial hair bleach is weaker than regular hair bleach, so you'd probly end up with a ginger/red streak... i don't think it's a very good idea

What would happen if I dyed my a streak in my hair using facial hair bleach?

It will probably go ginger.

What would happen if I dyed my a streak in my hair using facial hair bleach?

I had a friend who used that Jolen cream bleach in a few streaks at the front of her hair for years and i looked really natural. She was already a natural blonde though - not sure what would happen on darker hair.