GaryA. Model Expo sells 1/4" wide tape which may work for your scale. I've bought tape a couple of times on EBay which oddly enough is the same tape sold by Model Expo! Here's a link to the last roll I bought. 3M also makes copper tape. Originally, back in the 80"s when I first coppered a hull the foil sold by Model Shipways was non adhesive. Unfortunately, it's not available to the hobbyist anymore here. If you can find some it will save a lot of prep work.
Thanks for the feedback. Do you have a build log?
Copper Foil Tape. 1/4" X 36 YDS. 1.25 Mil Thickness. Thickness: 1.25 Mil. Backing: Copper. Manufacturer: Edco Copper Corp.
www.ebay.com