Okay, you got me !!

I really tried to...but sitting around all the afternoon is not my thing!

So i went into the shed and started sanding and adding putty to the head and some other head parts of the Battle Droid.

Head part; left after printing , right after adding putty and having sanded it, then added another coat of grey primer:

And the head got some.putty too:

Here it ist already fillered: