Working on a table built out of old barn wood. Used System Three epoxy, and had some issues. Stripped most of it, except what filled the holes. Two days later, used Arm-R-Seal oil and urethane as a topcoat. Put it on 12 hours ago, and it is still very sticky. Is it possible that it is reacting negatively with the epoxy? Or, should I not be using a oil-based finish on old barn wood?