My method is similar to Roby's, but I use shelve paper. I use Roby's method except instead of removing all the paper backing, I carefully cut the backing about 1/4 inch away from the stencil outline. This is the area that I stick to the surface I'm going to paint. If you remove all the backing, the shelf paper is almost impossible to remove; too much surface area is stuck to the airplane surface. Be sure to seal the outline with a light coating of the base color to prevent paint from seeping under the shelf paper.

Paul