Can you wear baby power in place of setting power?

Modern baby powder is really cornstarch with fragrance added, and cornstarch is a good cosmetic powder. You COULD use baby powder, but you'll walk around all day smelling like a baby. If one didn't want to smell like a baby all day, they sell cornstarch on the same aisle as the flour and sugar, and it's less expensive to get it that way. Apply it with a fluffy powder brush, or a Kabuki brush.