Aluma Guard - 16oz. Spray Bottle Aluma Guard One-Step Protectant is the easy and safe way to restore and preserve aluminum and other metals including stainless steel, brass and chrome. Specially formulated by Rupp Marine, Aluma Guard forms a protective coating on surfaces that prevents penetration of harmful substances and restores a lasting shine. Guards against pitting and corrosion caused by the harsh effects of marine use (saltwater). Requires No Rubbing or Polishing. Sold individually.