JB weld worked like a champ. Letters are installed on the Safari and the posts seem totally secure under the tension of the speed nuts.
To get the finish, I polished the face of the letters first, then masked off the raised edges using painters tape and a razor blade. A light coat of aluminum primer (rustoleum from HD) and two coats of Sail Blue (rustoleum from HD) finished the job. Once the masking tape was peeled off, a careful polish of the face removed any paint that leaked onto the edges.