Download free camouflage stencils from Krylon and OutdoorWriter.net. Krylon's stencil packet consists of individual shapes you can combine into custom patterns for many camouflage applications. The stencils offered by OutdoorWriter.net combine to create a grass pattern designed for duck-hunting boats.
To use camouflage stencils, choose spray paint colors found in the surrounding environment. The most effective camouflage patterns feature paint shades in the same color family, according to Krylon. Tape the stencils in place, apply the lightest shade of spray paint, and let it dry. Remove the stencils, reposition them, and apply a darker paint. Repeat the process with the remaining paint colors.