No it doesn't. Acid's a Poison type move and Steel is immune to Poison. You can't argue with that.
Yeah! And you can't loudly shout at a ghost type to damage it (Hyper Voice). You have to loudly shout at the ghost type as if you are ranting about something to get the job done (Snarl). It makes perfect sense, I tell ya!
You could also shout at them really suddenly (Astonish) and that'll work too.
You can lick a psychic and kill them, but licking a normal guy doesn't do anything. --- I'm not easily impressed; I'm usually oblivious to whatever's in front of me.