In Homestuck after John became consciously aware of the graffiti he had unconsciously done to his movie posters he sought out a way to use alchemy to restore them. He theorizes a way to subtract captchalogue codes from each other and tries to subtract a harlequin figure from a defaced Ghost Dad Poster producing three items, one being the painting at the cost of 425 Mercury Grist, a reference to the $425 that Hussie had to spend to obtain the tangible painting. It can be seen later in the story when Andrew first self-inserts himself hanging above his mantle.