i use them alot steve.
what i use them for is raised letters for my router.
even years ago i used them. what i did was this;
i would get some wallpaper / lining paper and draw with the plotter
say the word signs. i would make 2 exact copies. then with a
stanley knife i would cut all the letters up. just a rectangle or somthing round them. take them to my sheet of say perspex or aluminium and using some spray mount glue stick the peices ontop of the sheet.
take a jig saw and cut the letters out & then apply plastic locators.
now go back to the other copy you made and press the letters onto it marking where the locators are. hey presto you have made your self a set off raised letters complete with template for fixing to the wall or where ever! 😀
nowadays because we as a group buy the spray mask vinyl so cheap i just cut one copy in spray mask and stick it to the perspex. it also makes jigsawing it much easier & alot faster.