I have the same problem you are not alone.Im a very self concious about my arm hair.I have very pale fair skin and long dark arm hair.What i do is a get a hair trimmer.It shortens the hair.DO NOT SHAVE.it grows back thick and black.Thats just gross.Just buy a hair trimmer.Then one it is trimmed dye it a VERY light blonde.DO NOT BLEACH.Bleach will make ur arm hair white.Hope it helps(: