Flitz, Mass, Metal glo... all useful products... and all work about equally well. However, how do you know where, when and why to use them? Well, let's first start with why. Using a metal polish is done primarily to remove rust/corrosion from your razor. It however can also be used to lightly polish up certain types of razor scales, and brass inlays on razor scales (such as the ducks on a dubl duck razor), which will bring them to a brilliant luster.
[hide][top]When to use a metal polish
Typically you'll use a metal polish on old eBay razors to remove grime, rust and corrosion. Often, you can turn a pretty homely looking razor into a gleaming beauty with some metal polish and elbow grease. Less frequently, you might use metal polish to remove a stray water spot on the blade, which would be a more precise application, whereby you'd take a very small amount of polish and put it on a Q-Tip, and lightly rub the water spot out of the metal.
[hide][top]When/Where NOT to use metal polish
Basically, you'll want to shy away from using metal polish on any gold wash on the blade or spine, and/or light etchings on blades, as often - metal polish will quickly swirl and remove these pretty attributes.