If you wear make-up, you can use a powder. Firming powder gives your make-up a smooth finish by helping to fix the foundation and reduce cracks that can appear as wrinkles. However, you must ensure that you use your bonding powder properly and that you are using a powder with high-quality ingredients that actually benefit the skin. I do not recommend baking powder or cornstarch for face powder. Some have asked, "Can I use flour as a binder?