Vw beetle removable apron 

I use Dzues fasteners myself, quick release,solid holding,and I make use of them for quick release fenders also...my bug is race capable and I have fenders for that purpose while my stock fenders are for non contact driving...

I too used pop rivets, but only to fit it, I than drilled holes bigger and installed rivnuts . Any size or head type you prefer

I liked tip number 2. I've done that