Spray-on mud
Spray-on mud is a concept that has gotten some, but not an enormous amount of recognition. An article in the June 14, 2005 issue of The Guardian explains. But maybe the best things about spray-on mud are that (a) it is returnable [except that it is not] and (b) the manufacturer has a privacy policy.
(Thanks to Sven-Olov Bylund for bringing this to our attention.)