I'm new to this forum and have really enjoyed reading several threads over the last week or so. A lot of experience and knowledge, and a friendly atmosphere. I was working on a house in Washington DC that was built by George Washington's goddaughter. The heart pine flooring was believed to have been harvested from the forest at Mount Vernon. We had to remove a large section of the wood floor for construction so I was fortunate enough to acquire several pieces of this beautiful heart pine. One of the items i built with the wood is our dining room table. The table turned out very well, I left the nail and worm holes and a few other defects. The problem I am having is my poor selection of a finish. I used a wipe on poly and it's not holding up well to daily use. I would like to refinish it with tung oil. Do I need to remove the poly, and if so how?