This is something that happens to me for time to time, and in these circumstances I tend to look for easy wins to get me started. In all my years in this hobby, there have been few wins easier than these.
These are Brimstone Horrors for my 40k Daemons of Tzeentch army. For those who haven't been keeping up with all things Warhammer, when a Pink Horror does it turns into two smaller Blue Horrors, and when a Blue Horror dies it turns into two even smaller Brimstone Horrors.
Paint on these was incredibly quick. White undercoat, drenched with Tesseract Glow and then the eyes picked out with a green wash. I don't really think that they need any more than this, and I quite like that the Tesseract Glow hasn't taken on some of the high points of the models.
Arguably, the bases (done in the same way as the rest of the army) took more work...and before anybody says anything, the grass isn't catching fire because the Brimstone Horrors are made of magic flames - that's why it's green.
I got the Brimstone Horros as part of my birthday haul, which included a similar number of Blue Horrors and a Daemon Prince for 40k; Treebeard, Merry and Pippin for LotR; and a fantasy Mantic Terrain Crate that Warlord Games had in their sale.
I have a bit more birthday money to spend, so my tallies might take even more of a beating before long.