I love Sinful Colors. They have colorful polishes, they usually work well in water marbles, they are easy to find, and they are only $1.99 a bottle! When I was in the drug store the other day (looking for new polishes), I saw Heavy Metal. I'm not sure if it's new or not, but this is the first time I've seen it. Otherwise, I would already own it!
Heavy Metal is a metallic silver polish that was opaque in two coats. It goes on very smooth with no obvious brush strokes. It has a very metallic finish with a silver shimmer that almost looks like glitter. In this case, I think a picture (or two) speak a thousand words. I love that is a very bright silver. This is definitely my new favorite silver!