You can't
i once picked at my mole and it bled and and i thought it went away, but it somehow grew back. so my assumption is that unless you completely got rid of the beauty mark (i think only a professional can do that and i dont recommend it cause you might leave a scar) its not very likely that the beauty mark will go away. im sorry. but you can get it removed really easily and it doesnt cost too much if you just have it cut off.
a nuisance to get rid of
beauty mark (:
try foundation
Yes. He gets rid of the curse mark when he fights itachi for the last time.
it usually scabs over and scars.
you cant
Any store in the beauty department. Or hardware and beauty supply shops as well.
Yes on his chin(2)
Not exactly. It is believed to be a sign of beauty, but it doesn't exactly make everyone pretty.
no y cant otherwise you will die
i dont think there is a difference