Nancy Drew: The Final Scene Hints

How can I figure this part out?

  • 1 of 5: An impression of a key can be found in the Projector Room.
  • 2 of 5: Read the projector care manual on the table near some tape reels.
  • 3 of 5: The last page shows an indention of the missing key.
  • 4 of 5: Find a way to darken the impression.  A book in the Magician's Secret Rooms explains how to do it.
  • 5 of 5: Find a pencil and rub it over the impression.