Autoglym Polar Blast (2.5L). Polar Blast is a snow foam that should be applied using a pressure washer or foam gun as a pre-wash. Covering the entire Bike frame with a blanket of foam ensures none of the surfaces are missed in the cleaning process. The foam clings to paintwork longer than regular shampoos to gently loosen and lift dirt. This reduces the risk of scratches and swirl marks that can be caused by a sponge or brush when agitating heavy contamination on your paintwork. Its pH neutral formulation will not remove any existing layers of polish or wax.