I painted them up as 4 large black puddings, 4 medium/small sized green slimes and five small ochre jellies.
Here are some pics:
|You dumb, dead bastard...
I painted them with their primary color and then layered on other colors using drybrushing techniques. After they were dry, I put on a layer of matte finish to protect the paint. I'm not a great painter, but these turned out pretty well.
They don't really have any odor at all now. The paint sealed the "plastic".