There is a free pdf that can be downloaded from the TopNotch web site that explains how to use their masks. This is a Vinyl mask set suitable for airbrush or hand painting of a plastic model. It may be re-used more than once if carefully removed and replaced on the backing sheet after use without distorting or tearing the vinyl.
The "TopNotch FAA Vought F4U Corsair camouflage scheme vinyl mask set" would be an ideal fit for aviation enthusiasts or fans of World War II history who enjoy customization and personalization.