I have the diesel tank out of the boat for repairs, and I'm considering adding some airflow under the tank when I put it back. The plywood shelf the tank sits on is poorly glassed and part of the tank sits in moisture. The shelf also has a raw edge that has soaked some diesel, so I can't glass over it without removing & rebuilding, which I won't have time to do until Fall.
I'd like to get some airflow under the tank when I put it back in. I'm considering putting a thin, hard commercial rubber doormat with holes or channels molded in under the tank. Should be easy to cut, resistant to oil/ fuel, free of electrical/ galvanic corrosion issues, and provide some airflow without introducing anything that would rattle or bang around.
Anyone see a downside to this?