Don't Fret I'm a Trained Luthier Bumper Sticker Posted on 2012/12/14 by admin Let the world know you can step up should there be a guitar emergency! Also available as a Shirt. See other Luthier-Themed Shirts, Mugs, Etc. product tags: luthier, guitar, builder, funny, woodworker, music, stringed instruments, violin, dulcimer, guitar builder, bumper stickers,