Lee Elijah gets grey mud/clay poured all over her in the 3rd episode of 2018-2019 South Korean TV drama "The Last Empress". The show is currently available on Netflix.
The story takes place in an alternative reality where Korea is a constitutional monarchy with a Grand Empress as the official ruler. Lee Elijah plays some sort of evil government official (a villainess) who gets arrested by Shin Eun-kyung. She is then thrown into a tank where she gets wet cement poured all over her. Shin Eun-kyung also torments her by dunking her head into the cement. Eventually, the punishment is stopped by the empress (Park Won-sook), who rescues Lee and has her carried away to safety (the last pic).
In case it has to be said, the "cement" was fake, and no one was actually tortured or injured in real life. Duh.