Do not use gasoline, strong solutions or the corrosion and active clearing means. It can damage a paint and varnish covering. For removal of road tar use the pure soft fabric moistened with turpentine. Be accurate. For removal of remains of insects or pitch use warm water and the weak neutral washing solution or solution for a car wash. Moisten a sponge and slightly rub the polluted surface. If the covering lost the gloss, use the polish which is available on sale for cars.