What is pickling lime??!
Answers: and where can i get it. its for a project
Pickling lime: This is an acid or other chemical solution in which metal objects are dipped to remove oxide scale or other adhering substances, to preserve or steep in the brine, to clean or to antique woodwork by bleaching.
I don't know where you would get this agent. You could try the yellow pages depending on your project; might be metalworks, hardware store, woodworking or craft stores.