Gretchin or Grotz (take your pick)
I do like the underdog and this page shows how I painted my Grots for Warhammer 40K. Note that this is a topsy turvey guide in that some of the new pictures are in fact of new unpainted grots.
The first thing when basing Grotz is to fill the spacing left on the slottabase, I use some old green stuff I have.
I usually flock my Grotz before undercoating now.
For Orks I use black, for Gretchin and Grots I use a white undercoat as it usually results in a lighter look for the Grots and a darker look for the Orks.
The detailing on these models are excellent and they are full of character.
Once the white undercoat is done, the skin tones are painted in Goblin Green.
The next stage will be a highlight of Scorpion Green (as with my Gun Krew Grots).
Originally I had been using Bilious Green with my Grots. However I have encountered one issue which is Games Workshop now no longer make Bilious Green. So I have swapped to Scorpion Green which looks similar. The base Goblin Green was highlighted with Scorpion Green. I then mixed the Scorpion Green with Blazing Yellow for a final highlight. Equipment is then painted black.
I then drybrush the equipment with Boltgun Metal.
This is a shot of my previously (nearly) finished grots.