Originally Posted by
Simon Barden
What about drilling holes in a caul using the veneer as a template, gluing and clamping the veneer on and then immediately removing the dowels? Once the veneer is in place and clamped, you shouldn't need the dowels any more, so they don't need to remain whilst the glue dries.
Or else use the fretboard pinning method and knock a three of four thin panel pins into the headstock by a few mm, then cut off the pins about 1mm above the headstock face with angled (not flat edge) side-cutters so that they leave a pointed end. Use the dowel to locate the veneer onto the headstock face and tap it down so the veneer is then located by the pins. Then you can glue the headstock and clamp it with a flat caul without risk of the veneer slipping.