Petey's favorite distancing mechanisms were first mentioned back when he tried to wear it to his oboe recital in one of the old Post Magazine strips and again when he wore it to Thanksgiving dinner. I had a box of hats when I was a kid and whichever hat I chose for the day would define who I was that day. My favorite for a long time was an orange plastic helmet that said Dennis the Menace on it. I didn't turn into Dennis the Menace when I wore it, but it was a good looking hat. I also had an array of capes, most of which came from the towel shelf in the linen closet.
To reference another British movie, there's a character in The Snapper, a little girl in an extensive family, who appears in completely different get-ups in every scene. Including a drum majorette outfit and once with shaving cream all over her head. That made me laugh and stuck in my head as a useable idea for future whatchamacallit: future "homage". No, "theft" is the word I want.