In high pressure areas, you might find out that yer gonna need some washers between the pop rivet and the Coroplast. On my access doors, a few pop rivets got ripped out...so I had to re-rivet them with a washer to apply more surface area to keep the rivet from ripping through the Coroplast.
You might even consider using some pan head screws and a washer as long as you have something to fasten the screw to.