I have only framed panels in zinc came for hanging but now I need to know about trimming a panel for installation. I need to trim a copper foil panel (8" wide by 18" tall) that will be installed on the interior of a double paned glass window in a wooden door. I am using a Delphi catalogue to look at came. To trim should I use lead came, 1/8" Flat U? Thanks for your expert advice.