As a quick explanation my current character in a Teen Champions/DCTAS campaign set in Vibora Bay is Paladin a brick with minor light powers, who as an Christian Motif Character, wears a costume consisting of a Pure White Body suit with Gold Trimmings.
In Yesterdays adventure while we were searching for the Lair of Doctor Midnight, before he could block out the Sun (very important i had a date that Weekend and we were going to the Beach), i had to go through the sewers and the swamp, getting my costume filthy.
This set me to thinking about a power that would allow you to keep your costume from getting dirty, and after rejecting Change Enviroment, and Transform-both of which could be used to clean it, but not to keep it clean, i decided on the following
Force Wall PD 1/ED 0 (Persistant + 1/4, Always On -1/2, 0 End + 1/2, Self Only -1/2, Restricted Shape -1/4, Fully Invisible +1, Only to keep away dirt -2, OIHID -1/4) active cost 6.5 real cost 1.5 pts.
Basically your surrounded by an invisible field that repels dirt from your costume.
i know this is a silly power, but i thought it could be a fun build.