When framing pastels, having a professional do it is always the safest choice. Just make sure the framer is familiar with the dust of pastels. Some framers will not deal with pastels because the dust falls off while framing and can ruin your work of art, especially if you don't spray your pastels with fixative. If you choose to frame your own pastels, the key is to be extra careful when framing and don't lay the painting face down when putting on the backing. Instead stand the painting up and work on the back while someone holds the painting for you.