Maas International Liquid Metal Polish, 8-Ounce by Maas International Inc., us home, MAASJ. Save 2 Off!. $10.79. MAAS Metal Polish is very easy to use. MAAS Liquid Metal Polish is great for large surface areas. MAAS Metal Polish applies a super strong anti-tarnish corrosion inhibitor plus long-lasting protection. MAAS Liquid Metal Polish is for light to medium polishing or for surfaces previously restored with MAAS Metal Polishing crème.