I would like to use Eastwood Gator Guard II Truck Bed Liner Kit on my Newly installed One piece Floor Pan on my 1965 Ford Mustang. As you know this pan was very expensive and Very time consuming to put in. I also put in a new fire wall while I was at it. My question is; Is this a smart move? I really don’t want to ever have to have to replace these parts again! Have you ever heard anyone doing this? I think this would be a smart move to coat the inside and underside of the car, for water protection, sound deading and to protect the metal .