We did that when I was in grad school. Three of us rented this rat trap house. Before we moved in our stuff, we invited everyone we knew to a "theme party", the only thing we said was to dress grubby to befit our new home. What they didn't realize until they got there was that the "theme" was "paint our house".
About 20 people showed up. Given that we provided a keg and a smoked turkey as well as a bunch of rollers and paint buckets and brushes, the whole thing took about an hour. We then got sloshed and fat on turkey.
FQ13 who may be dumb, but not so dumb.