It's been a long time since I don't take this project back to life, so about time!
I had these metal guys:

So I added some plastic beakies in order to muster another squad:


I've tried some special marks on the 'Ultra' symbology, as well as the traditional weapon designation marks. Besides, I've recovered the sharkies

So this is the Squad!

Besides, I got a Mk.I Termie (hooray!)

Didn't paint him strictly RT style (you know, the helmet), but I think it still makes a deal. I should look for a Mk.II in order to finish the Termie squad I have.
You have the complete process here:
http://oldschoolworkshop.blogspot.com.es/2014/11/ultrasharks.htmlI should see what comes next (and try no not spend half a year thinking about it...)