I glued one rod to check how I will be doing the others ones underneath and aslo to see if it really works... I think it's working cool though! I still need to fill the gap underneath the rod like the predominant filled gap above. The rods will eventually become part of the surface of the train, just like my client asked for.
FINISHING DROID's ANTENNAS Below shows how I masked the antenna bit and the droid's head to avoid the filler from getting stuck to them. Then, I used car body filler in the gap between the the head and the antenna bit.
After removing the masking tape and sanding away the unwanted filled, I'm left with a nice clean line between the antenna bit and the head.