Make it a lil devil! Sculpey horns and tail, maybe claws on the pudgy little feet. Drill out the eyes and put red LEDs in there...
Oh, and a better paint job, as everyone else has said. A basecoat of "oops" paint, a little fleckstone, dribbled on weathering/aging, a couple coats of clear sealant.
If you don't want to go the "evil" route, blue or green LED eyes would be spooky without being demonic.
Whatever you do with it, put it on some elevated surface so that viewers can actually see it. Nothing's more aggravating than putting a lot of work into a lovely little detail and then finding out that no one even noticed because of where it was placed
