Rock On is a silver metallic with black glitters. I wasn't a fan of this when I saw it in the bottle, and even more disappointed when I applied it. It is very brush-strokey and..strange? I'm not sure how to describe it. Shown above is 2 coats with Miracle Gel top coat.
Stilettos & Studs is a shimmery dark grey metallic. This one was definitely the winner of the 3 for me. Applied smoothly, but overworking it will cause brush strokes. Shown above is 2 coats topped with Miracle Gel topcoat.
You can pick these up wherever Sally Hansen is sold!