Speaking of Cowl Vent covers, has anybody used one of the new magnetic ones? I've only seen them in the magazines so far. This seems like it would be okay to have on when not being driven, but I would be afraid that it would turn whatever dust and dirt that would be under it into sandpaper if you were to drive the car with it on.
1966 GT Convertible
1969 Sportsroof (which is For Sale, by the way)