Here's a thought. What we love about calling stations is that they will stick around to the end when we have a great hand and pay off. The tough thing about those guys can be that we can't scare them off so we don't push as hard on marginal hands. What I've been trying lately against maniacs is become a selective calling station. Find a good hand to play against them and let them do the betting. If they catch on, then I can get more aggressive with them with other hands. If they don't then it's still +EV for me.

Hand 1
I'll call his flop 3bet and check-call the turn

Hand 2
Call the turn raise

Hand 3
Looks great. Only vulnerable to a flopped set really. Could even cap the turn.