Get a frame you like!!!
I got mine at a thrift store for .92 cents and spray painted it black.
Find an image you like and print it out.
Take printed image and soak slightly in cold dark coffee.
You can use a spray bottle w/ coffee in it to add a more weather look.
Let your image dry over night. Then flatten w/ a book.
Its ok if there is puddles while drying.
and you need to get it really flat to make it look authentic.
Place picture in frame and hang. Now pat yourself on the back for being so clever!!!