A little elbow grease

I had a few free minutes in which to tackle the gorilla handprints on the dropped ceiling panels in my little room in the basement. (You'd think even a gorilla would notice that he is leaving prints, after one or two, or eight, panels, and go wash his hands at the sink ten steps away. No, he had to leave his mark on all of them.) The panels look like they have been painted before, so painting them again could be an option, but the worst of the grime came off with a little scrubbing with warm water, and the rest is hard to see in the glare of the fluorescent light.