My Cousins as Jedi Masters

This was a wedding present I did for my cousin and his wife, who is an avid Star Wars nut. This one was really tough to ink when it came to the smaller depictions at the bottom. I mainly use Faber-Castell pens, but the smallest nub I could find was an XS and it was still too big, so I tried to make do.

For the stars I tried using white ink applied with a tooth brush, but it was really transparent to the black background. I tried to compensate by using little dabs of white acrylic paint. I don't know if the white ink was just too old or what? I wonder if white ink loses its potency with age.