Yeah it's not that common to see one of these in peoples' collections.
I recently saw a fantastic build up over on RPF, and decided to add this to my Rebel line up. 
Got some Tamiya primer on the helmet, and after it dried I found that I did have to go back and re-putty the seams. Oh well. So now it's gray with puttied seams! Oh the progress is just staggering! 
[ATTACH=full]91478[/ATTACH]
I'll resand and reprime tomorrow. Then I'll have to test some colors as I'm trying to replicate a specific screen-used helmet from ROTJ. 