Hi Monkeys, I have a layering combo for you today: OPI Eurso Euro (a medium true blue creme that has a great formula). Max Factor Fantasy Fire is a sheer top coat that has color shifting particles in it. The color changes from red, orange, yellow, green depending on the angle. I've swatched FF before here and wasn't that excited about the combo. I think I prefer Girly Bits Shift Happens, here. But the FF is in a mini bottle and Shift Happens is a normal sized, so there's another downside of it. Pretty combo but Shift Happens seems to glow more.