Just about a month ago, I went through and pulled all the so-called sound deadener from the interior and treated all the floor pan with rust treatment. I don't remember the name, but I then used the rubberizer on the whole interior floor pan to replace the original treatment. It did help for noise reduction and gave a shinny coat over everything. As of exterior, I was thinking of using this product, but didn't have the time and the patience(or the room) for it. It worked really well for the interior though. I would recommend it for the exteior IMO. Hope it helps. Z ya