I would like to convert a pin from a post-type back (like a lapel pin) to a brooch/safety pin back. How can I do this?
Cut off the pin portion of lapel pin with a strong pair of nippers, such as memory wire shears. Using a needle file, file the cut end down as close to the back of the pin as possible as you will need a relatively flat surface to work with. Rough up the surface with the file to ensure a strong adhesive bond. Using a 2-part epoxy suited for non-porous surfaces, glue the appropriate size pin back finding to the prepared surface. Allow the epoxy to dry completely before handling.