I have recently seen at a show some liquid car insulation that contains little balls of ceramic... Anybody knows anything about that?
Also, I have often seen full size vans with their interior walls covered with something that looks a lot like spary-on polyurethane foam; I have also seen this foam inside the wheel wells of cars: does it work? It should be good against the tin-can noise inside a Suburban since it is "glued" on?
