The fan brush is a rather peculiar thing. People often look at it for the longest time and think "Just what on earth do I use this for?". Lets unearth it's mystery,shall we?
Firstly, you can use it to make ombre or gradient nails. Instead of using a piece of sponge for the purpose, use the fan brush! Check out how to get ombre nails over here at this blog entry> Ombre Nails
Secondly, you can use the fan brush to uniformly sprinkle on OR remove excess glitter on nails.