I'm restoring an williams indiana Jones cabinet. Was wondering if any of you guys have used anything on the bottom of cabinets to seal the mdf. I had to sand it a little harder than I wanted to and I don't want to paint it. Still has a decent finish on it, not wore through. I want to keep the factory look. Any advice on what you guys have used before would be appreciated. I've always left it natural but thought maybe sealing it would be better. Thanks Todd Scott