I know it. I call it "bad" resin, chemical reaction, a kind of (wrong) mixture between the A and B urethan resin components? A kind of sweating. I have this problem on two of my eagle CMs. I drilled openings in them to avoid this "oily sweating". I drilled these holes in the closed heads a year ago to dry them out and now it seems, that this chemical process is comming to an end. I will try to repaint them leaving open areas (same air pressure in and outside of the heads). I have no idea if it will work. Just a try. If it does not work, well, I will have two CMs for the garbage and Chris will sell two more .