Formerly, I put rubber cement on the back of the paper pattern and press it right down on the metal. The pattern stayed in place . . . or did it? The metal shape I cut out was not always exactly like the pattern I started with. Aha - that's when I realized the paper was shifting slightly on the metal. Not good.

Now, I put rubber cement on both the back of the paper pattern and on the metal. I let both of these dry completely and then stick them together.

This forms a great bond: therefore, it is important to put the pattern where you want it on the metal the first time since you will lose the bond if you move it.