Oil over acrylic?

[Kimberly Dow]

I pulled out an old painting recently. It is an unfinished acrylic figurative. I was not able to get the skin colors to blend sucessfully like I can in oil, so I set it aside. I want to go back and re-paint the skin in oil, can I? I have done this before a long time ago, on a practice canvas. It's still sitting around somewhere. I haven't seen anything go wrong with it except a tiny bit of differrence between matt and shine. Anyone know what the worst case scenerio of this is?

I tried a search on this topic and did not find anything.