I finally got Yan-Lo, primed the minis with Army Painter black primer, I've used it plenty of times before, on metal, resen, and plastic, never had a problem, so far have not had a problem with Yan-Lo's crew, except Chaiti, whose face and mask are featureless blobs, I thought maybe I went a little too heavy on the primer and covered the details, and went to try scraping some off lightly with a toothpick, and watches as the plastic oozed right off in a clump with the primer.
I've never had this happen before with this brans, and all the rest of the crew look ok, no loss of detail, no meltyness or squishyness. I'm actually not sure why it was just her head that was affected like this, they all come off the same sprue