maybe some flat white spray paint, depending on where/how your cab is set up.

also, you want to use the fans for exhaust. if they are rated for the same CFM then you can use one for intake and one for exhaust. you want to use the fans to pull hot, o2 filled, stale air out and to create a negative pressure in the cab to pull fresh, cool, co2 filled air into the cab.


-shake