When you get a Big Gunz blister you only get two krew. In my games I have found two krew is not really enough to last the game, so I now try and have as many as possible. I have been using standard grot models, but I have had some spare models hanging around for a while on my workbench so I decided to paint them up.
I started with a white undercoat, I usually use a black undercoat with my Orks, but as Grots are meant to be a lighter shade of green than Orks, I start off them with white.
I then give them a base coat of Goblin Green.
I also paint any metallic equipment black to give a better look when I add the metallic paint.
I then highlight them with Scorpion Green, I use to use Bilious green, however my last pot dried up and Games Workshop no longer make it. The Scorpion Green is very similar and does the same job.
I also highlight them again with a mix of Scorpion Green and yellow.
Uniforms are shades of brown to represent the rags they wear and to differentiate them from the Orks who wear grey. I also use Boltgun Metal for the metal parts.
Eyes are painted black with a red eye, whilst teeth and nails are done with Bleached Bone.
Bases will be the same as for my Orks, Codex Grey with a white drybrush.
My workbench shows details on painting the Big Gunz themselves.