Next, I took my bottle of nail polish thinner, and poured quite a lot – enough to almost fill up the bottle, but leaving about half a centimeter of room at the top, to more easily be able to mix it up. If you’re not sure how much thinner to use, err on the side of using less – you can always add more later. I use Orly nail polish thinner, but any almost nail polish thinner should work just fine; make sure it doesn’t contain acetone – a couple of the cheaper thinners do, and the acetone can eventually harm the polish.
As you can see, Harsh has been fully restored. It’s on the thin side for a glitter, though it’s still a bit thicker than most crèmes, and it’s very easy to use. If you use multiple coats, it does dry on the slow side – I’m not sure if that’s because it has dried out and been restored, or if it’s just a slow-drying glitter. It’s mostly opaque in two coats, but I prefer it as a one-coat glitter topper.