A person wearing a white glove is seen in this video using a rectangular trowel with a yellow side to spread a grayish substance on a white wall. The trowel is held at a slight angle. The person first spreads the substance horizontally. Then they smear some more of the substance vertically. Then the person spreads some more of the substance horizontally. The person's arm is visible. The person has fair skin with freckles. The area below the wall appears to be a dark brown or black color.