The grot bomb is complete, made using a nozzle from an icing bag (not sure if that translates, it's the little canvas bag cake makers use to add toppings to cakes). I got a set of the things all different shapes, so should give nice variety if I make a few of these.
The goggles sculpted onto the goblin pilot came out far better than expected too. And love his maniacal grin. Seems very fitting!