A rich snow foam applied using a pressure washer or foam gun Polar Blast is a snow foam available in a 2.5 litre which can be applied using a pressure washer or foam gun as a pre-wash stage. It covers the vehicle in a rich blanket of foam that clings to paintwork to gently loosen dirt and heavy soiling prior to shampooing. This reduces the risk of scratches and swirl marks caused by a sponge or wash mitt moving over heavy contamination. Polar Blast can be used instead of a shampoo as long as the vehicle isn't heavily soiled, just be sure to rinse the vehicle with water first to remove the top layer of dirt. Its pH neutral formulation will not remove any existing layers of polish or wax.