Kaydens and her sister Allison are bored and say they wish they had something to do. As if by magic the fake mud appears and the two girls start to roll around in it, in their very pretty dresses. They start to cover themselves and each other in the sludge, laughing and giggling as they do so. They have great fun continuing to roll around and slather themselves in the fake mud. The girls massage it into each others hair, and legs and all over the dresses.
Kaydens, being Kaydens, can't resist popping her boobs out so they can be covered too, and her sister Alisson follows suit and they cover their own boobs in fake mud. They then remove their dresses completely so they can cover more of themselves in fake mud, and are left wearing only their knickers. Now they have even more bare flesh to cover in the mud. The girls hurl mud at each other, and then Kaydens has Allsion lay on her front, and Kaydens mud massages her back.
I am afraid these scenes were filmed by Kaydens and I wasn't even in the same country . I don't know what the magic formula is, I am afraid. As you probably know, Kaydens has now left the UMD, so we may never know.
Glad you dig the scene and the substance anyway and sorry I couldn't help more.