I have a 95 Acura Integra which I have fully converted to EV. My question applies to just about any front engine (motor) car. What material can I buy and install that will close off the bottom of the engine compartment? It would seem that some form of plastic (or maybe aluminum) about 1/8" thickness and maybe about 4X6 feet in size would be a good starting point. The objective is to improve aerodynamic drag, reduce the chance of water intrusion, and generally keep things cleaner than having a typical open engine bay. Also, what kind of fasteners would work well? It would probably be a rare event that I would have to remove the pan for servicing, repairs, measurements, etc, but it should be relatively easy to remove and reinstall later, so pop rivets are out as is gluing or some other semi permanent attachment technique. Must be a pretty common situation so I'm hoping lots other enthusiasts will gain from comments from those of you who have already solved this problem.