*Blithers* This is one of those colours that I bought on impuse, then regretted buying because I thought I wouldn't like it, and then fell in love with after wearing it. It's just absolutely amazing. Omg, I can't stop looking at it. The polish is perfectly named, it definitely looks like gunmetal in my opinion, and it reminds me of this picture (Source) Gunmetal is a frosted bluish gunmetal grey. It'll look more or less blue depending on the light.
Picture is with flash in artificial light. Two coats and it's perfect. I like how it's a frost, but has almost no brush strokes. I also like how they now have a flat brush. It's not wide like the OPIs, but it just feels like it has better control. I didn't have to do any cleanup.
This is still on shelves in their regular collection so I highly recommend picking it up.