I can definitely leave it. I purchased a silver glitter polish as I was super into nail art, but I was super disappointed and it resulted in the polish drying out and being thrown away recently.
The bottle was long, and the brush was longer. I really wasn't a fan of the brush. The bristles were about as long as two fingernails put end to end, and it was skinny to boot. Perfect for stripes, forget about it if you wanted to do anything else. The formula was runny and sheer. It took several coats on a single line to get it opaque, and it still looked terrible. The brush was really hard to control, too.
Perhaps if it were shorter, or if it were in pen form, it'd be better. But this polish was just a waste of money and I haven't bought from this particular range again.
The brush on this is very flimsy and doesn't really work well in my opinion for decals. I don't think it's worth it.
Tips: Try freezing the brush so it's solid