How To Use Before applying, prep your skin with Trish McEvoy Gorgeous™ Illuminating Primer. Apply a small amount of foundation onto your fingertips, a brush, or the back of your hand. Blend into skin beginning at the centre of your face and moving outward. For a dewy, natural finish, blend using a damp sponge or use Trish's Brush 1 Even Skin Wet/Dry Face Perfector brush for a seamless, airbrushed look. Build to your desired coverage pressing into skin with your fingertips to ensure an even base.