Pipe the bombe into 5-cm / 2-in diameter demi-sphere fleximolds. Even out the surface with an offset spatula. Place in the freezer until hardened.
Once the bombe has hardened, unmold from the fleximolds. Adhere one dome to the other by placing a drop of white chocolate between them. Offset them; they should not form a perfect sphere. They should be offset by at least 1.25cm / .5 in.
Return to the freezer.
Place the white chocolate spray in a spray gun and spray the assembled bombes until they are completely coated.