I recently went to a exclusive hair design studio and received the perm of my life, it allowed my below shoulder length hair to begin breaking off at the roots. What was supposed to be a body wave turned into a poodle hair disaster. As you said hair does grow back. The moral of the story. Even if you go and spend hundreds of dollars there is no guarantees.
Hair is hair have fun with it.
People will envy your spontaneity and guts. It is supposed to come out in 21 washings but on blondes it is permanent. Anyway, thought i would share. Last October I tried some black semi-permanent, which I have since learned is a misnomer with black. It covered everything.