The first thing I did was cut and past a few different designs onto an excell spread sheet, enlarged them to actual size (or close to it), then cut them out. I then taped the design onto the tank and let it sit for a few day so I could look at it and decide which design I liked best . Installed on a Paughco gas tank. Scuffed the clear coat with a 3000 grit pad. Cleaned surface with alchohol. Applied Decals and the next day clear coated the whole tank. So far so good!! Great Custumer service.!!