I mounted this mallard about a week ago. It's been hanging on my wall drying. I've done maybe 15 ducks so far and this is the first of them I've noticed do this. Came home today and see this "spot" on the breast just in one place. About quarter size. Could it be anything other than grease? It's on the wall near my flesher and maybe I slung something up into it? But my wheel is in a box so I doubt that. I will say that I felt up til this point it was the best and most thorough i've ever fleshed, washed, and rinsed a bird. I'm baffled but afraid of the truth. Here's the entire bird hanging on the wall just to give an idea of what it looks like. The spot is about midway up the breast. Other than this I was overall pleased with how it looked. First time pose. Hope somebody can confirm or deny my fears and tell me can I do anything now to help. Maybe wipe the spot with laquer and and a qtip then dry again?