Long time WAM fetishist, recently have tapped into something that really gets me excited. I really love when the receiver gets absolutely caked and layered with various substances that actually somewhat dry into place. Its hard to describe but flour is the most common way this happens, but the feathers part of tar and feather works too.
I think towards the end of this shoot from Tropical Twins where the girl has her face covered in lipstick and then cigarette butts and various shavings are lumped on top is probably my favorite example i've found to date... but I really have no idea if this is a commonly enjoyed thing and I'm just searching for it with the wrong words, or if it is super obscure. https://umd.net/download_info/boss-goes-wrong-and-gets-messy-part-2
I definitely do enjoy the humiliation aspect of it so i do like the cigarette butts and would consider trash/dirt to be an excellent additive to these sorts of situations, but the general "caked with very thick layers of stuff" effect is what I love.
You are not alone. Seeing a woman covered in something sticky and then dry is thrilling and I too wish there was more content like that. It just adds an extra layer of humiliation. That Hamasho quiz was probably what first hooked me.
Sadly, I know that models typically don't using flour because it makes cleanup harder.
It's male wam but I'm covered in wood ash in one of my videos. I love things that set and harden too. Doesn't matter if its paint, latex or flour. There's not enough material out there.