Beautytester is right! You can use it as a finishing powder. In my experience it also gives really good coverage on its own. Try using a natural hair brush like the Sephora Collection Classic The Complexion Brush #53.
It works really well as a contouring or blush brush! Just use it on the flat side, to tap on blush or bronzer.
According to the description, you can. =)
Since it is a powder foundation, I would recommend using a fluffy face brush rather than the sponge if you want to use it as finishing powder.