On its own, Blue galaxy is a bit sheer due to the jelly base. It's full of green, blue and purple matte and satin matte glitter.
Index finger 4 coats
Middle finger 3 coats
Ring finger 2 coats
Pinky finger 1 coat
I'd sooner layer it over a similar polish than use it alone but if I didn't have a matching polish for it , 4 coats would be the one I would go for. It really has the best look to it in my opinion.
Leave each coat to dry fully because they can drag a bit leaving bald spots. The glitter really pops when you layer blue galaxy.
This would make a really eye catching accent nail too. I love the way it looks in the pictures but it just doesn't do it for me in real life. I prefer really bright manicures at the moment.
You can buy the 15ml bottle of Blue Galaxy for $8 on Etsy. I asked F4 about International shipping and all you have to do is email them on Etsy and they will set up a custom listing for you!