Sure, you can use car wax on your boat, as long as you are using Collinite 885 Fleetwax on your car.<br /><br />Not really kidding much about that either. Collinite 885 is far and away the best wax made and although it is advertised for use with planes and boats it works just fine on cars too. It has the longest life of any wax I've ever used and the greatest gloss too. Its a little work to apply, and you really do have to follow the instructions (don't let it dry completely), but absolutly nothing compares to it.<br /><br />Check out this comparison (from Power Boat Reports) on boat waxes and I think you'll see what I mean:<br /><br /> Link to Power Boat Reports Wax Testing <br /><br />Thom