Paint Mask/StencilAdhesive specialty-purpose vinyl designed for painting your lettering. Comes in a full sheet per side and is pen-drawn over cuts as a guide for application. Simply apply sheet to aircraft, then peel out what you wish to paint.
These work very well with shadows. They can be painted first, masked-off, then allowing the numbers to be painted all in one sheet.
*Any style/slant, shadow, etc. can be used with any material