RogerDo a Google search for P-51's and start looking at the props. You should find some pictures with the manufacturers decal intact. Download the image for your documentation.I did this and found over 40 pictures of a 1914 Jeannin Stahltaube, steel framed Taube.
Have no fear of the stencil style lettering. A perfect USAAF Stencil Font (true type) is available for FREE online:http://www.dafont.com/usaaf-stencil.fontDownload and install on your computer and you can create perfect military stencil markings.Mike