I should have known better, but the wall-to-wall vinyl carpeting on the floor of my 1990 F150 has been holding moisture against the metal for years. I ripped the stuff off when I discovered it, but not before a hole had rusted through the floor. Watch how I use steel, my welder and some autobody solder to fix this damage almost as good as new. If you’re tired of the drawbacks of catalyzed autobody filler, this is the technique for you.