You guys are talking about a backing plate inside the hull, where the nuts go on? Not a plate under the winch, top side? Right? The reason I ask, Is MarkSF talking about polishing a plate nobody's gonna see for the next 20 yrs. Kinda confused my poor little head. It did have little dinky washers on 5/16 bolts. Surprised it lasted this long with no apparent damage. And, of course, I'll seal the holes with epoxy! Who wouldn't? Don't say it! I've seen it before, too. LOL! Thanks guys, you are always helpful. Kevin