I am sure everyone has accidently dropped epoxy on unfinished wood. 

Seriously, no matter how quickly I attempt to clean it , it seems to have soaked in to the wood; I have used acetone and vinger, but still there are shadows of the drop.  With plywood you could sand it, but the original patina will be lost and end up sanding the whole piece, or sand thur the layer.  Any suggestions on how to deal with this problem we all have experienced?