This thread will show the steps I took to create functional air vents in the "foglight delete" panels on my 2014 WRX hatch. The objective is to channel this airflow into the wheel wells and improve the brake cooling. The starting point of the job was obtaining some appropriate mesh to replace the molded plastic closed mesh. Here's what I found:
This is expanded aluminum mesh, powder coated. I is a good match for the OEM pattern. Next, the installation of the mesh.