Absolutely! If you use powder foundations like BareMinerals, this is a great option. I think the bristles are too densely packed to use this with a finishing powder over liquid foundation, so I'd stick to use with powder foundation application.
Yes it can be BUT just be advised that because this is natural hair it does need to be washed more often then not .. natural hair brushes tend to be used with dry product so there is less chance of bactirea .. BUT it is an amazing brush for foundation , totally blends smooth with no lines !