Can Coat Fish With Baking Powder Instead Of Cornstarch?

Can Coat Fish With Baking Powder Instead Of Cornstarch? Baking powder is not a substitute for cornstarch. Since cornstarch acts as a thickening agent in recipes, baking powder does not possess the chemical components to replace cornstarch. Adding baking powder will create air bubbles but will not thicken the mixture. What can I use instead