This practice goes back at least as far as Jean Eugène Robert-Houdin, who used hollow wax bullets colored to resemble lead balls.
bullet | Ruby Wax | Nightmares on Wax | House of Wax | Bullet the Blue Sky | Bullet for My Valentine | Bullet | Wax Tailor | Silver Bullet | Bullet Boy | The Ballot or the Bullet | Royal Enfield Bullet | Paraffin wax | Fender Bullet | Bullet For My Valentine | Wax Simulacra | Wax Poetic | Wax play | wax play | Wax Museum at Fisherman's Wharf | Wax Museum | wax museum | The Bullet Train | Stray Bullet Games | Single-bullet theory | Silver bullet | Rubber bullet | rubber bullet | Riding the Bullet (film) | paraffin wax |