A positive message in permanent ink. What is the complete sentence?

Win 2 tickets to the final show of The Zombie Opera!

About:

• The name of the game is Find it in Pittsburgh Friday
• The mission is to try and figure out where the place/thing is by posting below
• Every hour or so, we will update the pic to reveal more hints.
• When the contest is over, we will post the original picture.

Rules:

• The first, most specific correct answer wins the prize!
• The answers must be posted in this thread, not on Twitter or Facebook
• Must be following @BoringPGH & @TheZombieOpera (or like them on Facebook)
• Must be #BurghVerified to claim your prize
• Contest ends Saturday, October 22, 2011 at 11pm. If nobody answers correctly by then, a random winner will be picked from the comments.

You can ask for clues! If you are not already a member of the forum, create an account, or login with your Twitter or Facebook. Good luck!

Hint: the key to figuring out the answer is to first figure out where it is…

Clue #4:

Tony said:

No idea. That is a tough one. It could be anything.

That's why you are free to ask for clues and hints. And also why we keep revealing more of the picture. When you figure out where it is, you can go there to see what it says. Find it in Pittsburgh.

Clue #6:

Elizabeth said:

If it's inside, and a great place during a zombie attack, does the building have high security?

Not really. Anyone could go there right now to read this message…

Clue #8: 

College building would be more accurate than subway station 

Clue #10:

Clue #12:

Clue #14: