as the attached photos demonstrate...
there are many styles of adhesive lettering available...
plaque examples are lying on the shelf below...
most of these are rivet or double stick auto tape.
my favorite is the style fly' displays in this thead...
http://www.airforums.com/forums/f4/a...aque-9287.html
these are multi rivet applied,
BUT can be attached with adhesive to the window or skin...
still available from a/s store and vintage trailer supply...
and one of the best lettering styles in a/s history.
cheers
2air'
click pic to open in 'nother window and enlarge away for a better look...