Use any word processor or graphics program to create the exactly the size and text, including spacing and alignment, italics, etc., that you want on your printer. Print it out on regular printer paper (20#).
Tape the paper onto the Monokote and cut out each character with an x-Acto knife. Then, tape the newly formed stencil onto the surface exactly where the lettering is to be attached. Peel off the backing and lay each character in place and tack it firmly in place with the iron. After all the characters are tacked, remove the stencil and carefully complete the ironing. Clean any leaking color adhesive with a little GoofOff. Voila! Perfect lettering using any type and size font available on your computer.